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1

Double ureter and congenital diverticulum of the ureter  

Microsoft Academic Search

Summary The ureteral duplication is a relatively common malformation and usually has no pathologic consequences. On the contrary, congenital diverticula of the ureter are rare and often give rise to urinary complications. A double malformation combining left ureteral duplication and a congenital diverticulum of the right ureter is reported and discussed. This rare case illustrates one and the same malformational

O Cussenot; F Desgrandchamps; P Teillac; A Lesourd

1991-01-01

2

Renal Pelvis and Ureter Cases - MP/H Rules  

Cancer.gov

RP/Ureter Case 1 SURGICAL PATHOLOGY REPORT Surgical Pathology Report October 20, 2007 Specim en: A. Left ureter biopsy B. Uterus and bladder C. Right ureter Final Diagnosis: A. Left ureter biopsy - invasive high grade urothelial carcinoma. B.

3

Bilateral retrocaval ureters with IVC duplication  

Microsoft Academic Search

We report a rare case of bilateral retrocaval ureters associated with duplicated inferior renal cava. A 69-year-old woman was sent to our emergency room for abdominal pain. Multidetector CT scan with multiplanar reconstruction revealed duplicated inferior renal cava and the bilateral ureters were positioned behind the duplicated inferior vena cava. To our knowledge, coexistence of bilateral retrocaval ureters and duplicated

Chen-Te Chou; Albert D. Yang; Yu-Cheng Hong; Hwa-Koon Wu

4

Spontaneous rupture of the ureter.  

PubMed

Spontaneous rupture of the ureter is a very rare condition and usually results from ureteral obstruction by a calculus. Only theoretical mecha nisms have been proposed and no possible explanation has yet been reported in the literature. Intravenous contrast-enhanced computed tomography is the most informative study with high sensitivity. Treatment should be individualised, and depends on the state of the patient. Minimally invasive endourological procedures with double-J catheter placement and percutaneous drainage offer excellent results. Conservative management with analgesics and antibiotic coverage may be an alternative to surgery. Herein, we present a case of spontaneous rupture of the proximal ureter with no evidence of an underlying pathological condition. PMID:25715862

Eken, A; Akbas, T; Arpaci, T

2015-02-01

5

Bilateral retrocaval ureters with IVC duplication  

Microsoft Academic Search

We report a rare case of bilateral retrocaval ureters associated with duplicated inferior renal cava. A 69-year-old woman\\u000a was sent to our emergency room for abdominal pain. Multidetector computed tomogram with multiplanar reconstruction revealed\\u000a duplicated inferior renal cavae and the bilateral ureters were positioned behind the duplicated inferior vena cava. To our\\u000a knowledge, coexistence of bilateral retrocaval ureters and duplicated

C. T. Chou; A. D. Yang; Y. C. Hong; H. K. Wu

2006-01-01

6

Bilateral retrocaval ureters with IVC duplication.  

PubMed

We report a rare case of bilateral retrocaval ureters associated with duplicated inferior renal cava. A 69-year-old woman was sent to our emergency room for abdominal pain. Multidetector computed tomogram with multiplanar reconstruction revealed duplicated inferior renal cavae and the bilateral ureters were positioned behind the duplicated inferior vena cava. To our knowledge, coexistence of bilateral retrocaval ureters and duplicated inferior renal cavae has not been reported in the literature. PMID:16534551

Chou, C T; Yang, A D; Hong, Y C; Wu, H K

2006-01-01

7

Modified Extravesical Ureteroneocystostomy for Completely Duplicated Ureters in Renal Transplantation  

Microsoft Academic Search

Introduction: Completely duplicated ureters are the most common congenital malformation of the upper urinary tract. However, there are very few reports on transplantation using kidneys with double ureters, and the technique of ureterocystoneostomy for completely duplicated ureters has not yet been established. Patients and Methods: We treated 3 patients with completely duplicated ureters at our institutions from January 1998 to

Junji Uchida; Toshihide Naganuma; Yuichi Machida; Koichiro Kitamoto; Takeshi Yamazaki; Tomoaki Iwai; Tatsuya Nakatani

2006-01-01

8

Inadvertent foley catheterization of the ureter.  

PubMed

We present a case of an 83-year-old woman with multiple sclerosis and chronic indwelling urethral catheter who was found to have a ureteral injury after inadvertent placement of a foley catheter into the proximal right ureter. Cystoscopy and retrograde ureteral stenting was attempted, but unsuccessful. The patient ultimately underwent successful antegrade ureteral stenting and nephrostomy placement. We review the limited literature on the topic of aberrant foley catheter placement into the ureter. PMID:24978365

Modi, Parth K; Salmasi, Amirali Hassanzadeh; Perlmutter, Mark A

2014-06-01

9

Synchronous Bilateral Carcinoma of the Ureter in Association with Unilateral Incomplete Duplication of the Ureter  

Microsoft Academic Search

A case of bilateral synchronous ureteral tumors, in association with a unilateral incomplete duplication of ureter, is presented. This patient underwent right nephroureterectomy with removal of a cuff of bladder, partial resection of left ureter, and ileal loop interposition between renal pelvis and bladder. Follow-up showed no recurrence in the residual urinary tract 2-years postoperatively.

Lia-Beng Tan; Biing-Rorn Tserng; Wei-Hwang Huang; Chia-Jiuan Tarn

1996-01-01

10

Familial occurrence of blind-ending bifid and duplicated ureters  

Microsoft Academic Search

Blind-ending bifid ureter in a girl with urinary tract infection, and a blind-ending duplicated ureter in her younger sister\\u000a are described. The embryology of this rare anomaly is briefly reviewed.

F. Aragona; G. Passerini Glazel; G. Zacchello; B. Andreetta

1987-01-01

11

Therapeutic Options in Lithiasis of the Lumbar Ureter  

Microsoft Academic Search

Introduction: In the past 25 years, the treatment of lithiasis of the lumbar ureter has evolved from ureterolithotomy to extracorporeal shockwave lithotripsy and\\/or endoscopic lithotripsy. Our objective has been to analyse the results of extracorporeal lithotripsy and endoscopic surgery in lithiasis of the lumbar ureter.Materials and Methods: We have analysed 734 single calculi of the lumbar ureter treated during the

Miguel Arrabal-Mart??n; Manuel Pareja-Vilches; Francisco Gutiérrez-Tejero; José Luis Miján-Ortiz; Francisco Palao-Yago; Armando Zuluaga-Gómez

2003-01-01

12

Double obstruction of ureter: A diagnostic challenge  

PubMed Central

Introduction: Isolated obstruction of the ureteropelvic junction and the vesico-ureteric junction are the two most common causes of hydronephrosis in a pediatric population.[1] They do not pose diagnostic difficulties when are present alone but when together can be difficult to diagnose. Here, we discuss the problems we faced when we encountered these two anomalies in the same ureter and the way in which we managed them. Aim: To assess the difficulties in diagnosis of pediatric patients who present with both ureteropelvic junction obstruction (UPJO) and vesico-ureteric junction obstruction (VUJO) in the ipsilateral ureter and their management protocol. Materials and Methods: This is a retrospective study. The study period is from 1 January 2004 to 31 December 2011. Out of 254 children who were diagnosed to have hydronephrosis due to UPJO in our institute, 5 patients (in the age range of 5 to 10 years) had both UPJO and VUJO in the ipsilateral ureter. The problems we faced in diagnosing the two conditions are mentioned with a literature review. Results: Operative intervention was used in four out of five patients; none of the patients had an accurate diagnosis before surgery. All patients were suspected of having double obstruction during pyeloplasty when appropriate size double J stent could not be negotiated through the vesicoureteric junction into the bladder. Postoperative nephrostogram confirmed the diagnosis in all patients. Conclusion: Children with double obstruction of the ipsilateral ureter present as a diagnostic dilemma. Because of the rarity of this condition it can escape the eye of even an astute clinician. Early diagnosis can be made if this condition is kept in mind while treating any hydronephrosis due to UPJO or UVJO. PMID:25197188

Halder, Pankaj; Shukla, Ram Mohan; Mandal, Kartik Chandra; Mukhopadhyay, Biswanath; Barman, Shibsankar

2014-01-01

13

Ovarian Remnant with Bilateral Duplicate Ureters  

Microsoft Academic Search

A 27-year-old woman had a history of acute chronic pelvic pain. She had had a previous salpingo-oophorectomy for an endometrioma. A computerized tomographic scan showed a left adnexal mass. She was known to have bilateral duplicate ureters shown on intravenous pyelogram. She underwent laparoscopy and retroperitoneal dissection of endometriosis with excision of the mass from the pelvic sidewall. The final

Thomas L. Lyons; Allyson J. Adolph; Wendy K. Winer

2003-01-01

14

Segmental dilatation of ureter: Report of two cases  

PubMed Central

Segmental dilatation of ureter is a giant, focal segmental ureteral dilatation producing an elongated and distorted ureter. Two children presented with this condition, one had ipsilateral megacalycosis and contralateral vesicoureteric reflux. The other had duplication of the kidney. The non-functioning lower moiety showed structure of xanthogranulomatous pyelonephritis. PMID:24604984

Dutta, Hemonta Kr.

2014-01-01

15

Ureteral reimplantation en bloc for refluxing duplicated ureters  

Microsoft Academic Search

Vesicoureteric reflux (VUR) is a major problem in completely duplicated ureters. So far, the treatment of choice has been the reimplantation of the two ureters in their common sheath, the ureterocystoneostomy “en bloc” according to Politano-Leadbetter's or Cohen's procedure. In recent years, some pediatric surgeons and urologists have questioned the efficacy of this method. We therefore analyzed 62 children with

W. Kistler; A. F. Schärli; H. Winiker

1994-01-01

16

Differential gene expression in the developing mouse ureter  

Microsoft Academic Search

In many instances, kidney dysgenesis results as a secondary consequence to defects in the development of the ureter. Through the use of mouse genetics a number of genes associated with such malformations have been identified, however, the cause of many other abnormalities remain unknown. In order to identify novel genes involved in ureter development we compared gene expression in embryonic

Eleanor K. L. Mitchell; Darrin F. Taylor; Kyra Woods; Melissa J. Davis; Amy L. Nelson; Rohan D. Teasdale; Sean M. Grimmond; Melissa H. Little; John F. Bertram; Georgina Caruana

2006-01-01

17

Ureter regeneration-the proper scaffold has to be defined.  

PubMed

The aim of this study was to compare two different acellular scaffolds: natural and synthetic, for urinary conduit construction and ureter segment reconstruction. Acellular aortic arch (AAM) and poly(L-lactide-co-caprolactone) (PLCL) were used in 24 rats for ureter reconstruction in both tested groups. Follow-up period was 4 weeks. Intravenous pyelography, histological and immunohistochemical analysis were performed. All animals survived surgical procedures. Patent uretero-conduit junction was observed only in one case using PLCL. In case of ureter segment reconstruction ureters were patent in one case using AAM and in four cases using PLCL scaffolds. Regeneration of urothelium layer and focal regeneration of smooth muscle layer was observed on both tested scaffolds. Obtained results indicates that synthetic acellular PLCL scaffolds showed better properties for ureter reconstruction than naturally derived acellular aortic arch. PMID:25162415

Kloskowski, Tomasz; Jundzi??, Arkadiusz; Kowalczyk, Tomasz; Nowacki, Maciej; Bodnar, Magdalena; Marsza?ek, Andrzej; Pokrywczy?ska, Marta; Frontczak-Baniewicz, Ma?gorzata; Kowalewski, Tomasz A; Ch?osta, Piotr; Drewa, Tomasz

2014-01-01

18

Duplicated ectopic ureter in a nine-year-old Labrador.  

PubMed

A nine-year-old male neutered Labrador retriever presented with a history of chronic urinary tract infections and occasional dribbling of urine. Abdominal ultrasound showed changes suggestive of a left ectopic ureter. A pneumocystogram revealed an air-filled distended tubular and tortuous structure extending from the region of the prostatic urethra to the left kidney, consistent with an ectopic ureter. Intravenous urography depicted the presence of an additional left ureter with only slightly larger diameter than the right and with normal insertion in the bladder neck. A duplicated ectopic left ureter was suspected and confirmed during surgery. To the authors' knowledge, this is the first description of a duplicated ectopic ureter in the canine species. The combination of ultrasound and contrast radiography was important to reach the diagnosis. PMID:23551207

Novellas, R; Stone, J; Pratschke, K; Hammond, G

2013-07-01

19

Ureter Regeneration–The Proper Scaffold Has to Be Defined  

PubMed Central

The aim of this study was to compare two different acellular scaffolds: natural and synthetic, for urinary conduit construction and ureter segment reconstruction. Acellular aortic arch (AAM) and poly(L-lactide-co-caprolactone) (PLCL) were used in 24 rats for ureter reconstruction in both tested groups. Follow-up period was 4 weeks. Intravenous pyelography, histological and immunohistochemical analysis were performed. All animals survived surgical procedures. Patent uretero-conduit junction was observed only in one case using PLCL. In case of ureter segment reconstruction ureters were patent in one case using AAM and in four cases using PLCL scaffolds. Regeneration of urothelium layer and focal regeneration of smooth muscle layer was observed on both tested scaffolds. Obtained results indicates that synthetic acellular PLCL scaffolds showed better properties for ureter reconstruction than naturally derived acellular aortic arch. PMID:25162415

Kowalczyk, Tomasz; Nowacki, Maciej; Bodnar, Magdalena; Marsza?ek, Andrzej; Pokrywczy?ska, Marta; Frontczak-Baniewicz, Ma?gorzata; Kowalewski, Tomasz A.; Ch?osta, Piotr; Drewa, Tomasz

2014-01-01

20

Ureter Smooth Muscle Cell Orientation in Rat Is Predominantly Longitudinal  

PubMed Central

In ureter peristalsis, the orientation of the contracting smooth muscle cells is essential, yet current descriptions of orientation and composition of the smooth muscle layer in human as well as in rat ureter are inconsistent. The present study aims to improve quantification of smooth muscle orientation in rat ureters as a basis for mechanistic understanding of peristalsis. A crucial step in our approach is to use two-photon laser scanning microscopy and image analysis providing objective, quantitative data on smooth muscle cell orientation in intact ureters, avoiding the usual sectioning artifacts. In 36 rat ureter segments, originating from a proximal, middle or distal site and from a left or right ureter, we found close to the adventitia a well-defined longitudinal smooth muscle orientation. Towards the lamina propria, the orientation gradually became slightly more disperse, yet the main orientation remained longitudinal. We conclude that smooth muscle cell orientation in rat ureter is predominantly longitudinal, though the orientation gradually becomes more disperse towards the proprial side. These findings do not support identification of separate layers. The observed longitudinal orientation suggests that smooth muscle contraction would rather cause local shortening of the ureter, than cause luminal constriction. However, the net-like connective tissue of the ureter wall may translate local longitudinal shortening into co-local luminal constriction, facilitating peristalsis. Our quantitative, minimally invasive approach is a crucial step towards more mechanistic insight into ureter peristalsis, and may also be used to study smooth muscle cell orientation in other tube-like structures like gut and blood vessels. PMID:24465961

Reesink, Koen D.; Kroon, Wilco; Delhaas, Tammo

2014-01-01

21

Evidence for Alpha Receptors in the Human Ureter  

NASA Astrophysics Data System (ADS)

An immunohistochemical and western blot expression analysis of human ureters was performed in order to characterize the alpha-1-adrenergic receptor distribution along the length of the human ureteral wall. Mapping the distribution will assist in understanding the potential role alpha -1-adrenergic receptors and their subtype density might have in the pathophysiology of ureteral colic and stone passage. Patients diagnosed with renal cancer or bladder cancer undergoing nephrectomy, nephroureterectomy, or cystectomy had ureteral specimens taken from the proximal, mid, distal and tunneled ureter. Tissues were processed for fresh frozen examination and fixed in formalin. None of the ureteral specimens were involved with cancer. Serial histologic sections and immunohistochemical studies were performed using antibodies specific for alpha-1-adrenergic receptor subtypes (alpha 1a, alpha 1b, alpha 1d). The sections were examined under a light microscope and scored as positive or negative. In order to validate and quantify the alpha receptor subtypes along the human ureter. Western blotting techniques were applied. Human ureter stained positively for alpha -1-adrenergic receptors. Immunostaining appeared red, with intense reaction in the smooth muscle of the ureter and endothelium of the neighboring blood vessels. There was differential expression between all the receptors with the highest staining for alpha-1D subtype. The highest protein expression for all three subtypes was in the renal pelvis and decreased with advancement along the ureter to the distal ureter. At the distal ureter, there was marked increase in expression as one progressed towards the ureteral orifice. The same pattern of protein expression was exhibited for all three alpha -1-adrenergic receptor subtypes. We provide preliminary evidence for the ability to detect and quantify the alpha-1-receptor subtypes along the human ureter which to the best of our knowledge has never been done with immunohistochemistry and molecular techniques. These findings may lend support to the preliminary studies of the effectiveness of alpha-receptor blockade on ureteral colic and stone passage.

Madeb, Ralph; Knopf, Joy; Golijanin, Dragan; Bourne, Patricia; Erturk, Erdal

2007-04-01

22

Inferior vena cava filter penetration into right proximal ureter.  

PubMed

Inferior vena cava (IVC) filter penetration into the renal collecting system is an infrequent event. We report a case of IVC filter penetration into the right proximal ureter resulting in gross hematuria, hydronephrosis and stone formation. PMID:24529023

Sherman, Christopher M; Rao, Sandhya R; Talluri, Sriharsha; Dwivedi, Amit J; Ankem, Murali K

2014-02-01

23

Transcaval ureter: a rare embryological anomaly causing obstructive uropathy.  

PubMed

A 21-year-old woman presented with a longstanding history of episodic right flank pain related to fluid consumption and recurrent urinary tract infections. On examination, there was right costovertebral angle tenderness. Renal tract ultrasound demonstrated hydronephrosis and CT urography confirmed transcaval ureter. The patient's clinical presentation was likely due to obstruction associated with the right ureter passing through the opening created by the duplicated segment of the inferior vena cava. While asymptomatic transcaval ureter can be managed conservatively, severe symptoms or complications of ureteric obstruction may require surgical treatment. In this case, treatment comprised a laparoscopic ureteroureterostomy with an end-to-end anastomosis between the proximal and distal sections of the right ureter. The patient's postoperative recovery was uneventful and she reported resolution of the flank pain during the one year of follow-up. PMID:25694637

Giddy, Stephanie; Thangasamy, Isaac; Vega Vega, Antonio

2015-01-01

24

Transitional cell carcinoma in a duplicated ectopic ureter  

Microsoft Academic Search

We report a case of transitional cell carcinoma occurring within an ectopically located upper pole ureter of a completely duplicated collecting system in an 81-year-old man. Presentation, evaluation, and management issues are discussed.

Scott D. Dudak; Rafael A. Antun

1995-01-01

25

Brg1 Determines Urothelial Cell Fate during Ureter Development  

PubMed Central

Developing and adult ureters express the epigenetic regulator Brg1, but the role of Brg1 in ureter development is not well understood. We conditionally ablated Brg1 in the developing ureter using Hoxb7-Cre and found that Brg1 expression is upstream of p63, Ppar?, and sonic hedgehog (Shh) expression in the ureteral epithelium. In addition, epithelial stratification in the basal cells required Brg1-dependent p63 expression, whereas terminal differentiation of the umbrella cells required Brg1-dependent Ppar? expression. Furthermore, the loss of ureteric Brg1 resulted in failure of Shh expression, which correlated with reduced smooth muscle cell development and hydroureter. Taken together, we conclude that Brg1 expression unifies three aspects of ureter development: maintenance of the basal cell population, guidance for terminal differentiation of urothelial cells, and proper investment of ureteral smooth muscle cells. PMID:23449535

Weiss, Robert M.; Guo, Songshan; Shan, Alan; Shi, Hongmei; Romano, Rose-Anne; Sinha, Satrajit; Cantley, Lloyd G.

2013-01-01

26

Urothelial synthesis of prostanoids in the ovine ureter  

Microsoft Academic Search

The purpose of this study was to investigate the site of production (urothelium\\/smooth muscle) and quantitative release of\\u000a prostanoids in the ureter. Quantitative analysis of prostacyclin (PGI2) was by its metabolite, 6-keto PGF1alpha, thromboxane (TXB2) and prostaglandin F2alpha. Synthesis by radiometry and radioimmunoassay was performed in vitro in sheep ureter specimens before and after removal of\\u000a the inner epithelial layer

Muslim Ali; Maria Angelo-Khattar; Layla Thulesius; Amal Fareed; Olav Thulesius

1998-01-01

27

Fstl1 Antagonizes BMP Signaling and Regulates Ureter Development  

PubMed Central

Bone morphogenetic protein (BMP) signaling pathway plays important roles in urinary tract development although the detailed regulation of its activity in this process remains unclear. Here we report that follistatin-like 1 (Fstl1), encoding a secreted extracellular glycoprotein, is expressed in developing ureter and antagonizes BMP signaling activity. Mouse embryos carrying disrupted Fstl1 gene displayed prominent hydroureter arising from proximal segment and ureterovesical junction defects. These defects were associated with significant reduction in ureteric epithelial cell proliferation at E15.5 and E16.5 as well as absence of subepithelial ureteral mesenchymal cells in the urinary tract at E16.5 and E18.5. At the molecular level, increased BMP signaling was found in Fstl1 deficient ureters, indicated by elevated pSmad1/5/8 activity. In vitro study also indicated that Fstl1 can directly bind to ALK6 which is specifically expressed in ureteric epithelial cells in developing ureter. Furthermore, Sonic hedgehog (SHH) signaling, which is crucial for differentiation of ureteral subepithelial cell proliferation, was also impaired in Fstl1-/- ureter. Altogether, our data suggest that Fstl1 is essential in maintaining normal ureter development by antagonizing BMP signaling. PMID:22485132

Gong, Jianfeng; Yu, Mingyan; Zhang, Fangxiong; Sha, Haibo; Gao, Xiang

2012-01-01

28

The retroperitoneal, inguinal approach to distal part of the ureter  

PubMed Central

Introduction The inguinal approach to the distal part of the ureter allows the surgeon to perform various types of procedures and is considered to be one of the minimally invasive techniques in pediatric surgery. We aim to describe our initial experience with the surgery of the distal ureter performed through an inguinal mini–incision. Material and methods Between March 2012 and June 2013, 8 patients were treated using a minimally invasive inguinal technique. The indications for surgical correction were single system primary obstructive megaureter, obstructive megaureter of the upper pole in a duplex kidney and distal ureteral stones. In all patients with single system obstructive megaureter and significant hydronephrosis, ureterocutaneostomy was performed. In one patient with duplex system primary obstructive megaureter and significant hydronephrosis of the upper pole, ureteroureterostomy of the dilated ureter to the normal caliber ureter in the distal part was performed. In the second patient with duplex system primary obstructive megaureter and reduced marker excretion of the upper pole in renal scintigraphy, ureterocutaneostomy was performed. In both cases of distal ureteral stones, deposits were removed by a simple incision. Results We did not observe any perioperative or postoperative complications. The imaging studies have shown that ureteral dilatation decreased in all but one child in whom the upper pole and the ureter were resected due to lack of function. Conclusions The inguinal approach allows for the adequate visualization of the distal ureter, creating the conditions for implementation of the various procedures, reduces the risk of retrovesical plexus injury and minimizes visible scars. PMID:24982797

Urbanowicz, Wies?aw; Sulis?awski, Janusz; Dobrowolska–glazar, Barbara

2014-01-01

29

Duplication of the Renal Pelvis and Blind-Ending Bifid Ureter in Twins  

Microsoft Academic Search

Blind-ending bifid ureter in a woman with urinary tract infection and a duplicated renal pelvis in her twin sister are reported. The blind-ending bifid ureter terminated as a fibrous cord with a terminal mass of immature renal tissue. This type of ureter may be a transitional form between histologically blind-ending bifid ureter and duplication of the renal pelvis and\\/or kidneys.

Bo Bergman; Goran Hansson; Arne E. V. Nilson

1977-01-01

30

Bilateral single system ectopic ureters opening into vestibule with bladder agenesis.  

PubMed

Almost 80% of ectopic ureters are associated with duplicated system, and 5-17% of ectopic ureters are bilateral. Ectopic ureters usually open into urethra, vestibule and vagina in females and into posterior urethra and seminal vesicles in males. Bilateral single-system ectopic ureter (BSSEU) is a rare entity in urology. BSSEU opening into a vestibule with the absence of urinary bladder is an extremely rare occurrence. We report such a case and briefly discuss its management. PMID:24474219

Baheti, Vishwas; Singh, Janak; Yadav, S S; Tomar, Vinay

2014-07-01

31

Down the tube of obstructive nephropathies: The importance of tissue interactions during ureter development  

Microsoft Academic Search

Congenital obstructive malformations of the ureter are amongst the most common human birth defects. To date, the etiology of these diseases has remained largely unexplored, which has preempted any rational approach for therapeutic intervention. Here, we describe that obstructive ureter defects can arise from genetic insults affecting various subprograms of ureter development including formation and patterning of the ureteric bud,

R Airik; A Kispert

2007-01-01

32

Ectopic ureter with complete ureteric duplication: Conservative surgical management  

Microsoft Academic Search

To assess the outcome of conservative procedures, the authors reviewed their experience in the management of 31 ectopic ureters with complete ureteric duplication. Twentyeight girls and three boys (aged 19 days to 10 years; mean, 30 months) were operated on between 1968 and 1994. Twentyfour of the children presented for evaluation of dribbling urinary incontinence and\\/or febrile urinary tract infections;

Alaa El Ghoneimi; Josefina Miranda; Tam Truong; Gerard Monfort

1996-01-01

33

Intracorporeal ileal ureter replacement using laparoscopy and robotics  

PubMed Central

Introduction Ileal ureter is a suitable treatment option for patients with long ureteric strictures. Minimally invasive techniques have been shown to be as safe as open techniques but superior in terms of post–operative recovery. We report our experience using minimally invasive techniques for total intracorporeal ureteral replacement. Material and methods A chart review revealed five patients who underwent intracorporeal ileal ureter using minimally invasive techniques in the preceding 5 years. 4 patients underwent conventional laparoscopic surgery and 1 patient underwent robotic–assisted surgery. Patient's characteristics, perioperative data and functional outcomes as well as a detailed description of surgical technique are reported. In all 5 of these patients, the ileal ureter was performed completely intracorporeally. Results The median age of our patients is 61 (range 42–73). The median operative time was 250 minutes (range 150–320) and median blood loss was 100 ml (range 50–200). The median hospital stay was 8 days (range 6–10) and there were no major perioperative complications reported. At median follow up of 22 months (range 4–38), there were no recurrences of strictures or any other complications. Conclusions We have demonstrated the safety and feasibility of minimally invasive intracorporeal ileal ureter. Numbers are still small but its application is likely to grow further. PMID:25667767

Sim, Allen; Todenhöfer, Tilman; Mischinger, Johannes; Halalsheh, Omar; Boettge, Johannes; Rausch, Steffen; Bier, Simone; Aufderklamm, Stefan; Stenzl, Arnulf; Gakis, Georgios

2014-01-01

34

Single-system ectopic ureters associated with renal dysplasia  

Microsoft Academic Search

The purpose of this study was to inquire into the clinical features and methods for the diagnosis and therapy of single-system ectopic ureters associated with renal dysplasia . Intravenous urography (IVP), diuretic B-mode ultrasound (B-US), and, in four cases, computerized tomography (CT) were performed in twelve female patients with renal dysplasia—seven on the left and five on the right—and the clinical

Yuan Ji Yan; Zhou Xue Feng; Zhou Hong Min; Yang Xiao Jin

2004-01-01

35

Primary lymphoepithelioma-like carcinoma of the ureter  

Microsoft Academic Search

Lymphoepithelioma-like carcinoma (LELC) is an uncommon tumor of the urinary tract. We present a case of LELC involving the ureter of a 71-year-old male patient with gross hematuria. On biopsy, the patient was diagnosed with invasive poorly differentiated carcinoma, with a final diagnosis of LELC on subsequent nephroureterectomy. On resection, the neoplasm was solitary and consisted of undifferentiated neoplastic cells

Daniela S. Allende; Mihir Desai; Donna E. Hansel

2010-01-01

36

[Isolated amyloidosis of the ureter. Apropos of a case and review of the literature].  

PubMed

Stenosis of the mid-portion of the right ureter and moderate hydronephrosis of the right kidney was seen on the intravenous pyelography of a 60-year-old patient consulting for sudden onset pain in the right inguinal region. Confirmation was obtained with retrograde urography and abdominal computed tomography. Right nephroureterectomy was performed. The pathology examination revealed characteristic features of amylosis located solely at the narrowing of the ureter. Isolated amylosis of the ureter is rare and difficult to diagnose. PMID:8089536

Zervas, A; Gavril, J; Alamanis, C; Sotsiou, F; Constadinidis, C; Dimopoulos, C

1994-01-01

37

Resection of blind ending bifid ureter in a patient with grade V vesicoureteric reflux.  

PubMed

Blind-ending bifid ureter is an extremely rare congenital anomaly. The authors report on a 13-year-old boy who presented with a previous diagnosis of right duplicated ureter and who had undergone a bilateral ureteroneocystostomy for vesicoureteral reflux in another clinic. The revision showed right blind-ending bifid ureter. The embryology, clinic and treatment of this anomaly is discussed. PMID:20306926

Sönmez, K; Türkyilmaz, Z; Karabulut, R; Ba?aklar, A Can

2010-01-01

38

A Rare Case of Right Retrocaval Ureter with Duplication of Infrarenal IVC  

PubMed Central

Retrocaval ureter, also known as circumcaval ureter, is a rare congenital anomaly which commonly presents with loin pain in middle age group. Here, ureter passes between the inferior vena cava (IVC) and psoas muscle and gets compressed. Duplication of IVC is another rare congenital anomaly in the development of IVC. We present a case of a 49-year-old male who presented with loin pain and upon thorough investigation was found to have retrocaval ureter along with duplication of the infrarenal IVC. We bring forward this rare type of combination of two congenital malformations. PMID:25478276

2014-01-01

39

[Radical prostatectomy for prostate carcinoma with ectopic ureter ; a case report].  

PubMed

A 71-year old male visited our hospital with a chief complaint of pollakisuria. The needle biopsies of the prostate were performed with PSA 8.0 ng/ml, and he was diagnosed as moderately differentiated adenocarcinoma. Imaging techniques revealed a right complete duplicated upper urinary system with an ectopic ureter draining to the prostatic urethra. He received radical prostatectomy with concomitant anastomosis of ureter to ureter. There is no evidence of hydronephrosis or tumor recurrence 11 months after operation. This is, to our knowledge, the second case report describing the association of radical prostatectomy and ectopic ureter. PMID:17419370

Funahashi, Yasuhito; Kamihira, Osamu; Kasugai, Shin; Kimura, Kyousuke; Fukatsu, Akitoshi; Matsuura, Osamu

2007-03-01

40

Renal calculi with retrocaval ureter: is percutaneous nephrolithotomy sufficient?  

PubMed Central

A 60-year-old woman presented with complaints of intermittent right flank pain which had begun one year ago. Ultrasonography and intravenous urogram showed right pelvic (15?mm) and inferior calyceal (6?mm) calculi along with suspected retrocaval course of right ureter, which was confirmed by contrast CT scan. Tc-99m diethylene-triamine-penta-acetic acid (DTPA) scan showed normal function and normal drainage of right kidney. Percutaneous nephrolithotomy (PCNL) was performed for right renal calculi. Because of curved ureteric course, negotiation of ureteric catheter in pelvis was anticipated to be troublesome, so intraoperative retrograde pyelogram (RGP) was performed to delineate the anatomy. Puncture was performed safely after air contrast pyelography. No complications occurred intraoperatively and postoperatively. On follow-up of up to 1?year patient was asymptomatic and renal scan showed normal function and drainage. So in the presence of retrocaval ureter and associated renal calculi, PCNL is a safe and optimal procedure and in condition of non-obstructive drainage, management of calculi only is adequate. PMID:23536623

Prakash, Jai; Raj, Anubhav; Sankhwar, Satyanarayan; Singh, Vishwajeet

2013-01-01

41

Primary large cell neuroendocrine carcinoma of the ureter  

PubMed Central

Large cell neuroendocrine carcinoma (LCNEC) is the rarest type of urinary tract malignancy. Herein, we report a case of LCNEC that arose in the ureter of a 78-year-old Japanese man with a history of ascending colon cancer that had been excised by a right hemicolectomy. Left-sided hydronephrosis associated with the ureteral tumor was discovered during follow-up. A left nephroureterectomy combined with a partial resection of the urinary bladder was performed because atypical cells were detected using voided urine cytology. A histopathological examination revealed that the ureteral tumor contained large atypical epithelial cells of neuroendocrine morphology without a urothelial carcinomatous component. The neoplastic cells were immunohistochemically positive for synaptophysin, chromogranin A, CD56, and cytokeratins, but they were negative for uroplakin III and thyroid transcription factor-1. The Ki-67 labeling index of the neoplastic cells was 50%. Transmission electron microscopy demonstrated the presence of numerous dense granules in the cytoplasm of the neoplastic cells. The ureteral lesion was finally classified as stage III, pT3 cN0 cM0. The patient’s postoperative course was uneventful without chemoradiotherapy, and LCNEC did not recur in the subsequent nine months. This case demonstrates that LCNEC can occur in the ureter, which normally does not contain neuroendocrine cells in the urothelium. PMID:23573321

Oshiro, Hisashi; Odagaki, Yu; Iobe, Hiroaki; Ozu, Chouichirou; Takizawa, Issei; Nagai, Takeshi; Matsubayashi, Jun; Inagaki, Atsushi; Miyake, Shinji; Nagao, Toshitaka

2013-01-01

42

A tumor of an ectopic ureter mimicking uterine cervix adenocarcinoma: case report and brief review.  

PubMed

Single system ectopic ureter is a rare congenital malformation of the urinary tract, frequently associated with genital tract malformations. We report the first case of an adenocarcinoma arising in an ectopic ureter in a woman and mimicking uterine cervical adenocarcinoma. A 34-year-old woman, previously diagnosed as having bicornuate uterus, presented with post-coital bleeding. On gynecological exam, there were two cervixes with a small nodule on the left cervix. After nodule biopsy, the initial diagnosis was adenocarcinoma of the uterine cervix. Pelvic ultrasound and magnetic resonance imaging demonstrated an ectopic tumoral ureter draining a dysplastic pelvic kidney and inserted in the cervix of a bicornuate uterus. The patient was treated by radical hysterectomy and left nephroureterectomy. Pathological exam demonstrated an adenocarcinoma arising in the ectopic ureter. We suggest that this case could be an argument for recommending regular follow-up for women with ectopic ureter for detecting malignant transformation. PMID:19404560

Jaidane, Mehdi; Slama, Adel; Bibi, Mohammed

2009-11-01

43

Surgical treatment of a duplicated and ectopic ureter in a dog.  

PubMed

An eight-month old female bull mastiff was referred for evaluation of urinary incontinence. Contrast-enhanced computed tomography identified complete duplication of the left ureter with ectopic insertion of the duplicate ureter into the proximal urethra. Ureteroneocystostomy was performed, which improved but did not resolve urinary continence. To the authors' knowledge, this report details only the second reported case of duplicated ectopic ureter in the dog and the first documenting surgical reimplantation; thus, double-system ureteral ectopia should be considered as a possible differential diagnosis for urinary incontinence. PMID:25168741

Newman, M; Landon, B

2014-09-01

44

Metastasis to the proximal ureter from prostatic adenocarcinoma: A rare metastatic pattern  

PubMed Central

Prostate cancer is one of the most common male malignancies, but it rarely metastasizes to the proximal ureter. We report a case of a 76-year-old man who presented with flank pain and lower urinary tract symptoms. Abdominal computed tomography scan revealed multiple filling defects at the middle of the left ureter, enlarged retroperitoneal lymph nodes, and probable psoas invasion. The patient underwent nephroureterectomy with excision of a cuff of bladder, and was found to have an adhesion between the middle part of left ureter and psoas intraoperatively. The pathological examination displayed positive immunohistochemical staining with prostate-specific antigen and prostate acid phostate, supporting the diagnosis of metastatic ureteral tumour from prostate cancer. In this case, periureteral soft tissue and ureteral muscular layer were infiltrated by metastatic tumour, whereas the mucosa was spared. The periureteral lymphatic pathway played an important role in the metastatic procedure of prostate cancer to the proximal ureter. PMID:25485016

Zhang, Tao; Wang, Qi; Min, Jie; Yu, Dexin; Xie, Dongdong; Wang, Yi; Ding, Demao; Chen, Lei; Zou, Ci; Zhang, Zhiqiang; Wang, Daming

2014-01-01

45

ORIGINAL ARTICLE ATP release from the human ureter on distension and P2X3  

E-print Network

. Sections of ureter were stained using antibodies against P2X3 and capsaicin receptors (TRPV1). [ATP] rose TRPV1 transient receptor potential vanilloid 1 Introduction Pain due to a calculus causing an acute

Burnstock, Geoffrey

46

Ectopic refluxing ureter entering a seminal vesicle cyst associated with ipsilateral renal dysplasia  

Microsoft Academic Search

The unusual case of a 10-month-old infant with an ectopic refluxing ureter entering into a seminal vesical cyst associated\\u000a with ipsilateral renal dysplasia is described. The embryology, differential diagnosis, and therapy are discussed.

J. Steffens; D. Oberschulte-Beckmann; V. Siller; P. Röttger; M. S. Polsky

2000-01-01

47

Ectopic ureter with urinary incontinence. An unusual presentation of Mayer–Rokitansky–Kuster–Hauser syndrome  

Microsoft Academic Search

Ectopic ureter occurs most commonly in association with ureterocele or duplication of the ureter. It is caused by a delay\\u000a in or failure of separation of the ureteric bud from the mesonephric duct during embryologic development. Vaginal agenesis\\u000a is the second most common cause of primary infertility in women after gonadal dysgenesis. Agenesis of the vagina in karyotypic\\u000a females may

M. S. Ansari; N. P. Gupta; A. Kriplani

2003-01-01

48

A tumor of an ectopic ureter mimicking uterine cervix adenocarcinoma: case report and brief review  

Microsoft Academic Search

Single system ectopic ureter is a rare congenital malformation of the urinary tract, frequently associated with genital tract\\u000a malformations. We report the first case of an adenocarcinoma arising in an ectopic ureter in a woman and mimicking uterine\\u000a cervical adenocarcinoma. A 34-year-old woman, previously diagnosed as having bicornuate uterus, presented with post-coital\\u000a bleeding. On gynecological exam, there were two cervixes

Mehdi Jaidane; Adel Slama; Mohammed Bibi

2009-01-01

49

The impact of method of distal ureter management during radical nephroureterectomy on tumour recurrence  

PubMed Central

Introducton: Radical nephroureterectomy for upper tract urothelial carcinoma (UTUC) must include some form of distal ureter management to avoid high rates of tumour recurrence. It is uncertain which distal ureter management technique has the best oncologic outcomes. To determine which distal ureter management technique resulted in the lowest tumour recurrence rate, we analyzed a multi-institutional Canadian radical nephroureterectomy database. Methods: We retrospectively analyzed patients who underwent radical nephroureterectomy with distal ureter management for UTUC between January 1990 and June 2010 at 10 Canadian tertiary hospitals. Distal ureter management approaches were divided into 3 categories: (1) extravesical tenting for ureteric excision without cystotomy (EXTRAVESICAL); (2) open cystotomy with intravesical bladder cuff excision (INTRAVESICAL); and (3) extravesical excision with endoscopic management of ureteric orifice (ENDOSCOPIC). Data available for each patient included demographic details, distal ureter management approach, pathology and operative details, as well as the presence and location of local or distant recurrence. Clinical outcomes included overall recurrence-free survival and intravesical recurrence-free survival. Survival analysis was performed with the Kaplan-Meier method. Multivariable Cox regression analysis was also performed. Results: A total of 820 patients underwent radical nephroureterectomy with a specified distal ureter management approach at 10 Canadian academic institutions. The mean patient age was 69.6 years and the median follow-up was 24.6 months. Of the 820 patients, 406 (49.5%) underwent INTRAVESICAL, 316 (38.5%) underwent EXTRAVESICAL, and 98 (11.9%) underwent ENDOSOPIC distal ureter management. Groups differed significantly in their proportion of females, proportion of laparoscopic cases, presence of carcinoma in situ and pathological tumour stage (p < 0.05). Recurrence-free survival at 5 years was 46.3%, 35.6%, and 30.1% for INTRAVESICAL, EXTRAVESICAL and ENDOSCOPIC, respectively (p < 0.05). Multivariable Cox regression analysis confirmed that INTRAVESICAL resulted in a lower hazard of recurrence compared to EXTRAVESICAL and ENDOSCOPIC. When looking only at intravesical recurrence-free survival (iRFS), a similar trend held up with INTRAVESICAL having the highest iRFS, followed by ENDOSCOPIC and then EXTRAVESICAL management (p < 0.05). At last follow-up, 406 (49.5%) patients were alive and free of disease. Conclusion: Open intravesical excision of the distal ureter (INTRAVESICAL) during radical nephroureterectomy was associated with improved overall and intravesical recurrence-free survival compared with extravesical and endoscopic approaches. These findings suggest that INTRAVESICAL should be considered the gold standard oncologic approach to distal ureter management during radical nephroureterectomy. Limitations of this study include its retrospective design, heterogeneous cohort, and limited follow-up. PMID:25485014

Kapoor, Anil; Dason, Shawn; Allard, Christopher B.; Shayegan, Bobby; Lacombe, Louis; Rendon, Ricardo; Jacobsen, Niels-Erik; Fairey, Adrian; Izawa, Jonathan; Black, Peter; Tanguay, Simon; Chin, Joseph; So, Alan; Lattouf, Jean-Baptiste; Bell, David; Saad, Fred; Drachenberg, Darrell; Cagiannos, Ilias; Fradet, Yves; Alamri, Abdulaziz; Kassouf, Wassim

2014-01-01

50

Bilateral complete ureteral duplication with calculi obstructing both limbs of left double ureter  

PubMed Central

INTRODUCTION A woman with bilateral complete ureteral duplication with stones simultaneously obstructing both limbs of the left double ureter is presented. A search of the English medical literature suggests that this is the first reported case. Based on the initial difficulty accessing the stones via ureteroscopy we make recommendations regarding how this rare problem should be approached if encountered. PRESENTATION OF CASE A 37-year old woman with left-sided flank pain was discovered on CT scan to have bilateral complete ureteral duplication and three stones obstructing both limbs of the left double ureter. Ureteroscopy was initially unsuccessful due to the very small calibre and unyielding nature of the ureters and both ureteral limbs were stented. Repeat ureteroscopy was easily achieved after pre-stenting and the impacted stones were completely cleared with intracorporeal laser lithotripsy. DISCUSSION The smaller calibre of both double ureters and their presence in a common adventitial sheath distally, made initial attempts at ureteroscopy difficult. Stenting both limbs increased ureteral compliance, passively dilated both ureters and allowed for improved manoeuvrability and retrograde passage of the ureteroscope. Based on the experience with this first reported case it is recommended that pre-stenting should be routinely performed prior to any attempt at ureteroscopy in cases of stones complicating completely duplicated ureters. CONCLUSION We report the first recorded case of bilateral complete ureteral duplication with stones simultaneously obstructing both limbs of the double ureter and recommend that routine pre-stenting be done prior to ureteroscopy to allow easy uncomplicated retrograde passage of the ureteroscope. PMID:25506845

Aiken, William D.; Johnson, Peter B.; Mayhew, Richard G.

2014-01-01

51

Thulium fiber laser lithotripsy in an in vitro ureter model  

NASA Astrophysics Data System (ADS)

Using a validated in vitro ureter model for laser lithotripsy, the performance of an experimental thulium fiber laser (TFL) was studied and compared to the clinical gold standard holmium:YAG laser. The holmium laser (?=2120 nm) was operated with standard parameters of 600 mJ, 350 ?s, 6 Hz, and 270-?m-core optical fiber. The TFL (?=1908 nm) was operated with 35 mJ, 500 ?s, 150 to 500 Hz, and a 100-?m-core fiber. Urinary stones (60% calcium oxalate monohydrate/40% calcium phosphate) of uniform mass and diameter (4 to 5 mm) were laser ablated with fibers through a flexible video-ureteroscope under saline irrigation with flow rates of 22.7 and 13.7 ml/min for the TFL and holmium laser, respectively. The temperature 3 mm from the tube's center and 1 mm above the mesh sieve was measured by a thermocouple and recorded throughout each experiment for both lasers. Total laser and operation times were recorded once all stone fragments passed through a 1.5-mm sieve. The holmium laser time measured 167±41 s (n=12). TFL times measured 111±49, 39±11, and 23±4 s, for pulse rates of 150, 300, and 500 Hz, respectively (n=12 each). Mean peak saline irrigation temperatures reached 24±1°C for holmium, and 33±3°C, 33±7°C, and 39±6°C, for TFL at pulse rates of 150, 300, and 500 Hz, respectively. To avoid thermal buildup and provide a sufficient safety margin, TFL lithotripsy should be performed with pulse rates below 500 Hz and/or increased saline irrigation rates. The TFL rapidly fragmented kidney stones due in part to its high pulse rate, high power density, high average power, and observation of reduced stone retropulsion and may provide a clinical alternative to the conventional holmium laser for lithotripsy.

Hardy, Luke A.; Wilson, Christopher R.; Irby, Pierce B.; Fried, Nathaniel M.

2014-12-01

52

Thulium fiber laser lithotripsy in an in vitro ureter model.  

PubMed

Using a validated in vitro ureter model for laser lithotripsy, the performance of an experimental thulium fiber laser (TFL) was studied and compared to the clinical gold standard holmium:YAG laser. The holmium laser (? = 2120 nm) was operated with standard parameters of 600 mJ, 350 ?s, 6 Hz, and 270-?m-core optical fiber. The TFL (?=1908 nm) was operated with 35 mJ, 500 ?s, 150 to 500 Hz, and a 100-?m-core fiber. Urinary stones (60% calcium oxalate monohydrate/40% calcium phosphate) of uniform mass and diameter (4 to 5 mm) were laser ablated with fibers through a flexible video-ureteroscope under saline irrigation with flow rates of 22.7 and 13.7 ml/ min for the TFL and holmium laser, respectively. The temperature 3 mm from the tube's center and 1 mm above the mesh sieve was measured by a thermocouple and recorded throughout each experiment for both lasers. Total laser and operation times were recorded once all stone fragments passed through a 1.5-mm sieve. The holmium laser time measured 167±41 s (n=12). TFL times measured 111±49, 39±11, and 23±4 s, for pulse rates of 150, 300, and 500 Hz, respectively (n=12 each). Mean peak saline irrigation temperatures reached 24±1°C for holmium, and 33±3°C, 33±7°C, and 39±6°C, for TFL at pulse rates of 150, 300, and 500 Hz, respectively. To avoid thermal buildup and provide a sufficient safety margin, TFL lithotripsy should be performed with pulse rates below 500 Hz and/or increased saline irrigation rates. The TFL rapidly fragmented kidney stones due in part to its high pulse rate, high power density, high average power, and observation of reduced stone retropulsion and may provide a clinical alternative to the conventional holmium laser for lithotripsy. PMID:25518001

Hardy, Luke A; Wilson, Christopher R; Irby, Pierce B; Fried, Nathaniel M

2014-12-01

53

Metachronous Primary Adenocarcinoma of Distal and Proximal Ureter within Two Years  

PubMed Central

Primary adenocarcinoma of the upper urinary tract, particularly of the ureter, is an extremely rare entity. We are reporting on the first case of metachronous appearance in one patient. The 71-year-old man underwent partial ureterectomy (R0 resection) for primary adenocarcinoma of the left distal ureter. 3 years later, nephroureterectomy had to be performed because of metachronous primary adenocarcinoma of the left proximal ureter. Extensive examinations revealed no evidence for further malignancies at both times. Primary adenocarcinoma of the upper urinary tract is rare but should be kept in mind, especially in patients with chronic inflammation and urinary tract obstruction. Due to the low incidence, there is a lack of data regarding its pathogenesis, diagnosis, and optimal treatment. PMID:24982812

Abt, Dominik; Müllhaupt, Gautier; Mordasini, Livio; Diener, Pierre André; Schmid, Hans-Peter

2014-01-01

54

Intra operative lesion of the pelvic ureter solved in a minimally invasive manner  

PubMed Central

Abstract Ureteral lesions during open hysterectomy, vaginal hysterectomy or laparoscopic hysterectomy have a rate of 0.2% up to 6%. Multiple complications may occur if the lesion is not recognised intra operatively: hydronephrosis, anuria (bilateral lesion), ureterovaginal fistula, ileus, peritonitis. The rate of recognition of an intra operative ureter lesion is 30% and it could rise up to 90% when cystoscopy with ureteroscopy is used at the end of the intervention. The article presents the case of a 46-year-old patient with uterine fibromatosis, whose pelvic ureter was sectioned during surgery. The lesion was recognised during surgery because, at the end of each intervention, the diuresis was stimulated by injecting Furosemide in order to detect the lesions of the ureters and urinary bladder. PMID:25408763

Stoica, RA; Enache, T; Iordache, N

2014-01-01

55

Fused ureters in patient with horseshoe kidney and aortic abdominal aneurysm  

PubMed Central

Horseshoe kidney (HSK) is a very common developmental abnormality in the kidney. They are associated with abnormalities like multiple renal arteries, abnormal position of the ureter in the renal pelvis and highly placed ureteropelvic junction. These can result in urological complications. However, the ureters run their separate course and empty individually into the urinary bladder. Surprisingly, anatomical anomalies do occur and can lead to unexpected findings on investigation or surgical treatment. Such anomalies can present diagnostic and management challenges to unsuspecting clinicians. This report deals with one of such anomalies that seem not to have been reported before in the literature. This case is a rare finding of fused ureters over the renal isthmus in a patient with HSK who also has aortic abdominal aneurysm (AAA). Simultaneous occurrences of HSK and AAA have been reported severally in the past, and the authors are paying attention on the ureteral anomaly. PMID:25433080

Obidike, Stephen; Woha, Akeh; Aftab, Fuad

2014-01-01

56

Comparison of a new polytetrafluoroethylene-covered metallic stent to a noncovered stent in canine ureters.  

PubMed

The aim of this study was to determine the feasibility of using a newly designed polytetrafluoroethylene (PTFE)-covered metallic stent in the ureter by comparing its effectiveness with that of the noncovered stent in a canine model. We placed 14 stents in the ureters of seven mongrel dogs that weighed 30-40 kg each. The covered and noncovered stents were deployed in the right and left ureters, respectively, of six dogs. In the seventh dog, a covered stent and a double-J catheter were inserted in the right ureter, and a covered stent only was inserted in the left ureter. The first six dogs were sacrificed at 5, 10, and 15 weeks after deployment of the stents (two for each follow-up period), and the seventh dog was sacrificed at 30 weeks. There was no migration or poor expansion of any of the stents observed on plain radiography. On intravenous pyelogram and retrograde pyelogram, all of the covered stents at each follow-up period had patent lumens at the stented segments without hydronephrosis, and the passage of contrast material through it was well preserved. The noncovered stents in the dogs sacrificed at 5 and 10 weeks and one of the two dogs sacrificed at 15 weeks showed near-complete occlusion of the stent lumen due to ingrowth of the soft tissue, and severe hydronephrosis was also noted. The noncovered stent in the other dog sacrificed at 15 weeks showed the passage of contrast material without hydronephrosis, but the lumen of the stent was still nearly occluded by the soft tissue. There was no evidence of hydronephrosis or passage disturbance of the contrast material in both ureters of the dog sacrificed at 30 weeks. We conclude that the newly designed PTFE-covered stent effectively prevented the luminal occlusion caused by urothelial hyperplasia compared to the near-total occlusion of the noncovered stents, and no migration of the covered stents was noted. PMID:18214599

Chung, Hwan-Hoon; Lee, Seung Hwa; Cho, Sung Bum; Park, Hong Suk; Kim, Young Sik; Kang, Byung Chul; Frisoli, Joan K; Razavi, Mahmood K

2008-01-01

57

Comparison of a New Polytetrafluoroethylene-Covered Metallic Stent to a Noncovered Stent in Canine Ureters  

SciTech Connect

The aim of this study was to determine the feasibility of using a newly designed polytetrafluoroethylene (PTFE)-covered metallic stent in the ureter by comparing its effectiveness with that of the noncovered stent in a canine model. We placed 14 stents in the ureters of seven mongrel dogs that weighed 30-40 kg each. The covered and noncovered stents were deployed in the right and left ureters, respectively, of six dogs. In the seventh dog, a covered stent and a double-J catheter were inserted in the right ureter, and a covered stent only was inserted in the left ureter. The first six dogs were sacrificed at 5, 10, and 15 weeks after deployment of the stents (two for each follow-up period), and the seventh dog was sacrificed at 30 weeks. There was no migration or poor expansion of any of the stents observed on plain radiography. On intravenous pyelogram and retrograde pyelogram, all of the covered stents at each follow-up period had patent lumens at the stented segments without hydronephrosis, and the passage of contrast material through it was well preserved. The noncovered stents in the dogs sacrificed at 5 and 10 weeks and one of the two dogs sacrificed at 15 weeks showed near-complete occlusion of the stent lumen due to ingrowth of the soft tissue, and severe hydronephrosis was also noted. The noncovered stent in the other dog sacrificed at 15 weeks showed the passage of contrast material without hydronephrosis, but the lumen of the stent was still nearly occluded by the soft tissue. There was no evidence of hydronephrosis or passage disturbance of the contrast material in both ureters of the dog sacrificed at 30 weeks. We conclude that the newly designed PTFE-covered stent effectively prevented the luminal occlusion caused by urothelial hyperplasia compared to the near-total occlusion of the noncovered stents, and no migration of the covered stents was noted.

Chung, Hwan-Hoon, E-mail: chungmic@korea.ac.kr; Lee, Seung Hwa; Cho, Sung Bum [Ansan Hospital, Korea University College of Medicine, Department of Radiology (Korea, Republic of); Park, Hong Suk [Korea University, Ansan Hospital, Department of Urology (Korea, Republic of); Kim, Young Sik [Korea University, Ansan Hospital, Department of Pathology (Korea, Republic of); Kang, Byung Chul [Ewha Women's University, Mokdong Hospital, Department of Radiology (Korea, Republic of); Frisoli, Joan K.; Razavi, Mahmood K. [Stanford University Medical Center, Department of Vascular and Interventional Radiology (United States)

2008-05-15

58

Ectopic vaginal insertion of an obstructed duplicated ureter in an adult female: demonstration by magnetic resonance imaging  

Microsoft Academic Search

The usual presentation of an ectopically inserted vaginal ureter is continuous dribbling of urine in an otherwise healthy girl. This case did not present with the usual symptomatology, as there was severe stenosis of the ectopically located ureteric orifice. Conventional imaging failed to show the vaginal insertion of an ectopic ureter. However, a magnetic resonance urogram readily depicted the collecting

Kiran A. Jain

2007-01-01

59

A Rare Case of Retrocaval Ureter Associated with Persistent Left Vena cava  

Microsoft Academic Search

We report a rare case of a retrocaval ureter associated with a left inferior vena cava transposition and with concomitant nephrolithiasis in a young woman already surgically treated during her first years of life for cardiovascular disease. Diagnosis and surgical procedure are described, including the use of a flexible ureterorenoscope to facilitate kidney stone removal.

V. Gramegna; A. Madaro; F. Pellegrini; S. Capizzi; O. Romano; D. Massari; G. Liessi

2003-01-01

60

An intrarenal supernumerary ovary concurrent with a completely duplicated pelvis and ureter.  

PubMed

An intrarenal supernumerary ovary is particularly rare. To the best of our knowledge, only two cases have been documented so far, all reported without other congenital malformations. In this case report, we present the first case of this lesion, which is concurrent with a completely duplicated pelvis and ureter on the right side. PMID:17364133

Zhigang, Zhao; Wenlu, Shen

2007-10-01

61

Ureteral bladder augmentation using the lower pole ureter of a duplicated system  

Microsoft Academic Search

Megaureters of nonfunctioning renal segments in a duplex system are commonly available for use in reconstructive procedures secondary to high-grade reflux, ectopic ureter, ectopic ureterocele, or obstructive megaureter. The use of megaureters subtending a nonfunctioning lower pole renal segment for bladder augmentation in 2 patients is reported.

Jacob Ben-Chaim; Alan W. Partin; Robert D. Jeffs

1996-01-01

62

An intrarenal supernumerary ovary concurrent with a completely duplicated pelvis and ureter  

Microsoft Academic Search

An intrarenal supernumerary ovary is particularly rare. To the best of our knowledge, only two cases have been documented\\u000a so far, all reported without other congenital malformations. In this case report, we present the first case of this lesion,\\u000a which is concurrent with a completely duplicated pelvis and ureter on the right side.

Zhao Zhigang; Shen Wenlu

2007-01-01

63

[Surgical treatment of tuberculosis of the kidney with a total lesion of the ureter].  

PubMed

The study was aimed to improve the efficiency of surgical treatment of renal tuberculosis with total lesion of the ureter. The clinical course and the results of surgical treatment of 104 patients with extended or multiple ureteral strictures of specific (n=92) and non-specific (n=12) etiology. Thirty-five patients with nephrotuberculosis underwent percutaneous needle-guided nephrostomy (PNGNS), 79 underwent surgery with removal of organs: open nephrectomy with lumbar access (48), combined nephroureterectomy (31). According to the evaluation the glomerular filtration rate after PNGNS, value less than 10 ml/min led to performing nephrectomy, more than 10 ml/min - ureteroplasty. It was established that combined nephroureterectomy has significant advantages in the case of specific kidney disease, despite a long duration as compared with a nephrectomy. Removal of the kidney with ureter in patient with nephrotuberculosis is the prevention of persistent dysuria, empyema of ureter stump, its possible malignant transformation, and contributes to significant improvement of quality of life of the patient. Of the 35 patients after CHPNS, 25 underwent intestinoplasty of ureter: ileum was used in 23 patients, appendix- in 2 patients. It is shown that reconstructive surgery using small intestine allows to release 92% of patients from a lifetime external drainage of the kidney. PMID:24956668

Zuban', O N; Skorniakov, S N; Arkanov, L V; Novikov, B I; Chotchaev, R M

2014-01-01

64

An artificial model for studying fluid dynamics in the obstructed and stented ureter.  

PubMed

Fluid dynamics in the obstructed and stented ureter represents a non-trivial subject of investigation since, after stent placement, the urine can flow either through the stent lumen or in the extra-luminal space located between the stent wall and the ureteric inner wall. Fluid dynamic investigations can help understanding the phenomena behind stent failure (e.g. stent occlusions due to bacterial colonization and encrustations), which may cause kidney damage due to the associated high pressures generated in the renal pelvis. In this work a microfluidic-based transparent device (ureter model, UM) has been developed to simulate the fluid dynamic environment in a stented ureter. UM geometry has been designed from measurements on pig ureters. Pressure in the renal pelvis compartment has been measured against three variables: fluid viscosity (?), volumetric flow rate (Q) and level of obstruction (OB%). The measurements allowed a quantification of the critical combination of ?, Q and OB% values which may lead to critical pressure levels in the kidney. Moreover, an example showing the possibility of applying particle image velocimetry (PIV) technology to the developed microfluidic device is provided. PMID:24110941

Carugo, D; Elmahdy, M; Zhao, X; Drake, M J; Zhang, X; Clavica, F

2013-01-01

65

Ileal substitute of ureter with reflux-plasty by terminal intussusception of bowel: animal experiments and clinical experience.  

PubMed

The conflicting results reported after substitution of the ureter by isolated bowel segments suggest that the procedure is still hazardous. This induced us to check experimentally the performance of the ileal ureter with antireflux-plasty before using it clinically. The antireflux mechanism is constructed by intussuscepting the terminal 8 cm. of an isolated ileal segment into each other thus forming a nipple. After vesicoileostomy the nipple protrudes into the urinary bladder. In the pig vesicoileorenal reflux was prevented, and anterograde urinary flow from the kidney through the ileal ureter into the bladder was unobstructed. Finally, the case of a patient is recorded who was submitted to the same procedure successfully. PMID:857371

Tscholl, R; Tettamanti, F; Zingg, E

1977-04-01

66

Ectopic vaginal insertion of an obstructed duplicated ureter in an adult female: demonstration by magnetic resonance imaging.  

PubMed

The usual presentation of an ectopically inserted vaginal ureter is continuous dribbling of urine in an otherwise healthy girl. This case did not present with the usual symptomatology, as there was severe stenosis of the ectopically located ureteric orifice. Conventional imaging failed to show the vaginal insertion of an ectopic ureter. However, a magnetic resonance urogram readily depicted the collecting system from the kidney to the point of ureteric insertion. PMID:17189850

Jain, Kiran A

2007-01-01

67

Cytokeratin 15 Marks Basal Epithelia in Developing Ureters and Is Upregulated in a Subset of Urothelial Cell Carcinomas  

PubMed Central

The mammalian ureter contains a water-tight epithelium surrounded by smooth muscle. Key molecules have been defined which regulate ureteric bud initiation and drive the differentiation of ureteric mesenchyme into peristaltic smooth muscle. Less is known about mechanisms underlying the developmental patterning of the multilayered epithelium characterising the mature ureter. In skin, which also contains a multilayered epithelium, cytokeratin 15 (CK15), an acidic intermediate filament protein, marks cells whose progeny contribute to epidermal regeneration following wounding. Moreover, CK15+ precursor cells in skin can give rise to basal cell carcinomas. In the current study, using transcriptome microarrays of embryonic wild type mouse ureters, Krt15, coding for CK15, was detected. Quantitative polymerase chain reaction analyses confirmed the initial finding and demonstrated that Krt15 levels increased during the fetal period when the ureteric epithelium becomes multilayered. CK15 protein was undetectable in the ureteric bud, the rudiment from which the ureter grows. Nevertheless, later in fetal development, CK15 was immunodetected in a subset of basal urothelial cells in the ureteric stalk. Superficial epithelial cells, including those positive for the differentiation marker uroplakin III, were CK15-. Transformation-related protein 63 (P63) has been implicated in epithelial differentiation in murine fetal urinary bladders. In wild type fetal ureters, CK15+ cells were positive for P63, and p63 homozygous null mutant ureters lacked CK15+ cells. In these mutant ureters, sections of the urothelium were monolayered versus the uniform multilayering found in wild type littermates. Human urothelial cell carcinomas account for considerable morbidity and mortality. CK15 was upregulated in a subset of invasive ureteric and urinary bladder cancers. Thus, in ureter development, the absence of CK15 is associated with a structurally simplified urothelium whereas, postnatally, increased CK15 levels feature in malignant urothelial overgrowth. CK15 may be a novel marker for urinary tract epithelial precursor cells. PMID:24260555

Tai, Guangping; Ranjzad, Parisa; Marriage, Fiona; Rehman, Samrina; Denley, Helen; Dixon, Jill; Mitchell, Karen; Day, Philip J. R.; Woolf, Adrian S.

2013-01-01

68

MR urography findings of a duplicated ectopic ureter in an adult man  

Microsoft Academic Search

.   In this report we present the imaging findings in an adult male with a duplicated ectopic ureter which inserted into the\\u000a prostatic urethra. The appearances at excretory urography, US, CT, and MR urography are described together with the potential\\u000a pitfalls of the imaging techniques. Both US and MR urography accurately image the collecting system from the kidney to the

G. Engin; T. Esen; ?. Rozanes

2000-01-01

69

Robot-assisted laparoscopic ipsilateral ureteroureterostomy for injury of an ectopic duplicated ureter following robotic prostatectomy  

Microsoft Academic Search

We report the feasibility and the safety of a robot-assisted laparoscopic ipsilateral ureteroureterostomy in a patient who\\u000a had previously undergone a robot-assisted laparoscopic radical prostatectomy and was found postoperatively to have complete\\u000a right sided ureteral duplication with apparent injury to the distal ectopic ureter. Robot-assisted laparoscopic ipsilateral\\u000a ureteroureterostomy was performed transperitoneally using the same six port sites that had previously

Lance Hampton; Mark Kawachi

2008-01-01

70

Effect of balloon dilation of ureter on upper tract dynamics and ureteral wall morphology.  

PubMed

Sixteen male Yucatan minipigs underwent balloon dilation of the right ureterovesical junction (UVJ) and lower ureter to twice its normal caliber. With the bladder open, bilateral upper tract dynamics measurements under different perfusion rates (0.5, 2, and 4 ml/min) were recorded predilation, immediately after dilation, and 1, 2, 3, 4, and 6 weeks after dilation. Immediate and late antegrade nephrostograms, suprapubic cystograms, and right antegrade nephrostograms (oblique view) were taken. In the chronic experiment, no difference in renal pelvic pressure (Ppvs) was detectable between the control and dilated sides immediately after dilation. Only at 4 ml/min was there a statistically significant increase in the Ppvs of the dilated ureter 1 week after dilation when compared with the controls. At 2 weeks, this obstructive change had disappeared. At 3, 4, and 6 weeks, Ppvs of the dilated ureter declined progressively in comparison with the control side, but the difference was not statistically significant. At 6 weeks, Ppvs of the dilated ureter decreased significantly compared with predilation readings only at 4 ml/min. Immediate antegrade radiologic evaluation revealed that 69% of the experimental animals had no extravasation, while 31% showed variable degrees of extravasation, which disappeared completely on late antegrade nephrostograms (6 weeks). Grade 2 reflux occurred in 33% of the experimental animals at 1 week and had disappeared at 6 weeks. Histologic examinations at 1, 2, and 3 weeks revealed a nonhomogeneous pattern of ureteral damage, ranging from total rupture to much less dramatic injury.(ABSTRACT TRUNCATED AT 250 WORDS) PMID:8358417

Selmy, G; Hassouna, M; Bégin, L R; Coolsaet, B L; Elhilali, M

1993-06-01

71

Maturation of ureter-bladder connection in mice is controlled by LAR family receptor protein tyrosine phosphatases  

PubMed Central

Congenital anomalies affecting the ureter-bladder junction are frequent in newborns and are often associated with other developmental defects. However, the molecular and morphological processes underlying these malformations are still poorly defined. In this study, we identified the leukocyte antigen–related (LAR) family protein tyrosine phosphatase, receptor type, S and F (Ptprs and Ptprf [also known as Lar], respectively), as crucially important for distal ureter maturation and craniofacial morphogenesis in the mouse. Embryos lacking both Ptprs and Ptprf displayed severe urogenital malformations, characterized by hydroureter and ureterocele, and craniofacial defects such as cleft palate, micrognathia, and exencephaly. The detailed analysis of distal ureter maturation, the process by which the ureter is displaced toward its final position in the bladder wall, leads us to propose a revised model of ureter maturation in normal embryos. This process was deficient in embryos lacking Ptprs and Ptprf as a result of a marked reduction in intrinsic programmed cell death, thereby causing urogenital system malformations. In cell culture, Ptprs bound and negatively regulated the phosphorylation and signaling of the Ret receptor tyrosine kinase, whereas Ptprs-induced apoptosis was inhibited by Ret expression. Together, these results suggest that ureter positioning is controlled by the opposing actions of Ret and LAR family phosphatases regulating apoptosis-mediated tissue morphogenesis. PMID:19273906

Uetani, Noriko; Bertozzi, Kristen; Chagnon, Melanie J.; Hendriks, Wiljan; Tremblay, Michel L.; Bouchard, Maxime

2009-01-01

72

Hernia of the bladder through the broad ligament with renal agenesis and ipsilateral ureter blind ending  

PubMed Central

Hernia through a defect of the broad ligament is extremely rare in children. These defects can result from a developmental defect or a spontaneous rupture of cystic formations remnants of mesonephric ducts or Müller. Genital anomalies associated with unilateral renal agenesis are more common in females. We report the case of a 13 months girl allowed for assessment of recurrent urinary tract infection; abdominal examination did not objectified palpable mass, the external genitalia were without abnormalities. Abdominal ultrasound revealed a left renal space is empty with a retrovesical cyst. Cystography was requested that objectified a large pelvic cystic mass retrovesical communicating with the bladder, there was also a left vesicoureteral reflux. Uro- MRI showed a cystic formation retrovesical communicating with the bladder, the right pelvic kidney; uterus is normal size for age. DMSA scintigraphy confirmed the absence of the left kidney with the right kidney that ensures 100% of total renal function. To surgical exploration we found a hernia of the bladder through the left broad ligament, the uterus was dislocated on the right side; left ovary was hypoplasic; the ipsilateral ureter was blind with renal agenesis, we performed by reduction of the bladder then closing the hernial orifice, dissection of the ureter with its ligation and section at the vesical stoma. The postoperative course was uneventful. Evolution is favorable. This observation illustrates a hernia of the bladder through the broad ligament associated with ovarian hypoplasia, renal agenesis and ipsilateral ureter blind ending; this association was not described to our knowledge in the literature. PMID:25422693

El Madi, Aziz; Khattala, Khalid; Rami, Mohammed; Bouabdallah, Youssef

2014-01-01

73

Hernia of the bladder through the broad ligament with renal agenesis and ipsilateral ureter blind ending.  

PubMed

Hernia through a defect of the broad ligament is extremely rare in children. These defects can result from a developmental defect or a spontaneous rupture of cystic formations remnants of mesonephric ducts or Müller. Genital anomalies associated with unilateral renal agenesis are more common in females. We report the case of a 13 months girl allowed for assessment of recurrent urinary tract infection; abdominal examination did not objectified palpable mass, the external genitalia were without abnormalities. Abdominal ultrasound revealed a left renal space is empty with a retrovesical cyst. Cystography was requested that objectified a large pelvic cystic mass retrovesical communicating with the bladder, there was also a left vesicoureteral reflux. Uro- MRI showed a cystic formation retrovesical communicating with the bladder, the right pelvic kidney; uterus is normal size for age. DMSA scintigraphy confirmed the absence of the left kidney with the right kidney that ensures 100% of total renal function. To surgical exploration we found a hernia of the bladder through the left broad ligament, the uterus was dislocated on the right side; left ovary was hypoplasic; the ipsilateral ureter was blind with renal agenesis, we performed by reduction of the bladder then closing the hernial orifice, dissection of the ureter with its ligation and section at the vesical stoma. The postoperative course was uneventful. Evolution is favorable. This observation illustrates a hernia of the bladder through the broad ligament associated with ovarian hypoplasia, renal agenesis and ipsilateral ureter blind ending; this association was not described to our knowledge in the literature. PMID:25422693

El Madi, Aziz; Khattala, Khalid; Rami, Mohammed; Bouabdallah, Youssef

2014-01-01

74

Analytical solutions for the specific activities of a traced substance within the component parts of a simulated kidney-ureter system  

Microsoft Academic Search

Two models for a kidney-ureter system are considered: one model of one vessel in which a traced substance, undergoing exchange\\u000a between the vessel and an external compartment, is emptying into the ureter; the second model of two approximately parallel,\\u000a identical vessels in which a traced substance, undergoing exchange between each vessel and an external compartment, is emptying\\u000a into the ureter.

J. O. Lawson; H. R. Branson

1970-01-01

75

Transvesical laparoendoscopic single-site management of distal ureter during laparoscopic radical nephroureterectomy.  

PubMed

Objective: To describe the management of the distal ureter during radical nephroureterectomy with T-LESS approach. Methods: Between January 2010 and October 2013, five patients underwent LRNU for upper urinary tract carcinoma with T-LESS approach. Patients were placed in supine position. A 2.5 cm skin incision was made in the line between the pubis and the umbilicus. The bladder identified and a multiport was inserted into the bladder. The patients were repositioned to a lateral decubitus position, pneumovesicum was established and the ureteral openings were identified. We marked the bladder cuff with electrocautery all the way through to the extravesical fat. The bladder defect was sealed with suture. After checking for any leak or bleeding, the multiport was removed and the bladder was closed. At this point we continued with nephrectomy by standard laparoscopy or LESS. A 18 French Foley catheter was placed into the bladder. Results: The mean age was 70 years (range 58 years to 81 years), mean operative time was 198 minutes (range 115 min to 390 min), the mean time for the management of the distal ureter was 35 minutes (range 27 min to 45 min), mean estimated blood loss was 234 cc (range 60 cc to 850 cc), mean hospital stay was 3,8 days (range 2 days to 8 days). In all patients the bladder cuff was free of disease. Conclusion: The transvesical laparoendoscopic single site approach to the distal ureter for upper urinary tract carcinoma appears safe and reproducible, with faster closure of the bladder defect and improved cosmesis. PMID:25089622

Nunez Bragayrac, Luciano; Machuca, Victor; Saenz, Eric; Cabrera, Marino; de Andrade, Robert; Sotelo, Rene J

2014-08-01

76

Transvesical Laparoendoscopic Single-Site Management of Distal Ureter During Laparoscopic Radical Nephroureterectomy.  

PubMed

Abstract Objective: To describe the management of the distal ureter during radical nephroureterectomy with the transvesical laparoendoscopic single-site surgery (T-LESS) approach. Methods: Between January 2010 and October 2013, five patients underwent laparoscopic radical nephroureterectomy for upper urinary tract carcinoma (UTUC) with the T-LESS approach. Patients were placed in the supine position. A 2.5-cm skin incision was made in the line between the pubis and the umbilicus. The bladder was identified and a multiport was inserted into the bladder. The patients were repositioned to a lateral decubitus position; pneumovesicum was established and the ureteral openings were identified. We marked the bladder cuff with electrocautery all the way through to the extravesical fat. The bladder defect was sealed with sutures. After checking for any leak or bleeding, the multiport was removed and the bladder was closed. At this point, we continued with nephrectomy by standard laparoscopy or LESS. A 18F Foley catheter was placed into the bladder. Results: The mean age was 70 years (range 58-81 years), the mean operative time was 198 minutes (range 115-390 minutes), the mean time for the management of the distal ureter was 35 minutes (range 27-45 minutes), the mean estimated blood loss was 234?mL (range 60-850?mL), and the mean hospital stay was 3.8 days (range 2-8 days). In all patients the bladder cuff was free of disease. Conclusion: The transvesical laparoendoscopic single-site approach to the distal ureter for UTUC appears safe and reproducible, with faster closure of the bladder defect and improved cosmesis. PMID:25211699

Nunez Bragayrac, Luciano A; Machuca, Victor; Saenz, Eric; Cabrera, Marino; de Andrade, Robert; Sotelo, Rene J

2014-09-11

77

Hydrogen Sulfide Plays a Key Role in the Inhibitory Neurotransmission to the Pig Intravesical Ureter  

PubMed Central

According to previous observations nitric oxide (NO), as well as an unknown nature mediator are involved in the inhibitory neurotransmission to the intravesical ureter. This study investigates the hydrogen sulfide (H2S) role in the neurogenic relaxation of the pig intravesical ureter. We have performed western blot and immunohistochemistry to study the expression of the H2S synthesis enzymes cystathionine ?-lyase (CSE) and cystathionine ?-synthase (CBS), measurement of enzymatic production of H2S and myographic studies for isometric force recording. Immunohistochemical assays showed a high CSE expression in the intravesical ureter muscular layer, as well as a strong CSE-immunoreactivity within nerve fibres distributed along smooth muscle bundles. CBS expression, however, was not consistently observed. On ureteral strips precontracted with thromboxane A2 analogue U46619, electrical field stimulation (EFS) and the H2S donor P-(4-methoxyphenyl)-P-4-morpholinylphosphinodithioic acid (GYY4137) evoked frequency- and concentration-dependent relaxations. CSE inhibition with DL-propargylglycine (PPG) reduced EFS-elicited responses and a combined blockade of both CSE and NO synthase (NOS) with, respectively, PPG and NG-nitro-L-arginine (L-NOARG), greatly reduced such relaxations. Endogenous H2S production rate was reduced by PPG, rescued by addition of GYY4137 and was not changed by L-NOARG. EFS and GYY4137 relaxations were also reduced by capsaicin-sensitive primary afferents (CSPA) desensitization with capsaicin and blockade of ATP-dependent K+ (KATP) channels, transient receptor potential A1 (TRPA1), transient receptor potential vanilloid 1 (TRPV1), vasoactive intestinal peptide/pituitary adenylyl cyclase-activating polypeptide (VIP/PACAP) and calcitonin gene-related peptide (CGRP) receptors with glibenclamide, HC030031, AMG9810, PACAP6–38 and CGRP8–37, respectively. These results suggest that H2S, synthesized by CSE, is involved in the inhibitory neurotransmission to the pig intravesical ureter, through an NO-independent pathway, producing smooth muscle relaxation via KATP channel activation. H2S also promotes the release of inhibitory neuropeptides, as PACAP 38 and/or CGRP from CSPA through TRPA1, TRPV1 and related ion channel activation. PMID:25415381

Fernandes, Vítor S.; Ribeiro, Ana S. F.; Martínez, Pilar; López-Oliva, María Elvira; Barahona, María Victoria; Orensanz, Luis M.; Martínez-Sáenz, Ana; Recio, Paz; Benedito, Sara; Bustamante, Salvador; García-Sacristán, Albino; Prieto, Dolores; Hernández, Medardo

2014-01-01

78

Right double inferior vena cava associated with retrocaval ureter: computed tomographic findings in two cases.  

PubMed

Two cases of right double inferior vena cava (RDIVC) were observed on computed tomography. In one case, the duplicated IVCs were both located to the right of the abdominal aorta and were nearly on the same coronal plane. In the other case, the right IVC showed partial duplication. The right ureter coursed posterior to the lateral IVC, then emerged between the duplicated IVC in both cases. The findings from the two cases presented in this report showed novel anatomical differences, likely attributable to different embryologic processes, as compared to previously reported cases of RDIVC. PMID:24513316

Shin, Mack; Lee, Jong Beum; Park, Sung Bin; Park, Hyun Jeong; Kim, Yang Soo

2014-01-01

79

[Right ectopic ureter with ipsilateral renal agenesis presenting with infertility: a case report].  

PubMed

A 30-year-old man was referred to our hospital with a complaint of male infertility, presenting abnormal semen analysis (semen volume 0.1 ml, sperm concentration 1.2 x 10(6)/ml, sperm motility 0%). Radiological examinations demonstrated right renal agenesis and a cystic mass extending from the prostate to the posterior of the bladder. Our final diagnosis was obstruction of the ejaculatory duct secondary to right ectopic ureter associated with ipsilateral renal agenesis. The patient was treated by transurethral unroofing of the cyst. Three months after the surgery, the cystic mass disappeared and the seminal findings showed marked improvement. PMID:15293745

Kawahara, Takashi; Nishiyama, Hiroyuki; Okubo, Kazutoshi; Ito, Noriyuki; Kinoshita, Hidehumi; Yamamoto, Shingo; Kamoto, Toshiyuki; Ogawa, Osamu

2004-06-01

80

Investigating the Flow Dynamics in the Obstructed and Stented Ureter by Means of a Biomimetic Artificial Model  

PubMed Central

Double-J stenting is the most common clinical method employed to restore the upper urinary tract drainage, in the presence of a ureteric obstruction. After implant, stents provide an immediate pain relief by decreasing the pressure in the renal pelvis (P). However, their long-term usage can cause infections and encrustations, due to bacterial colonization and crystal deposition on the stent surface, respectively. The performance of double-J stents - and in general of all ureteric stents - is thought to depend significantly on urine flow field within the stented ureter. However very little fundamental research about the role played by fluid dynamic parameters on stent functionality has been conducted so far. These parameters are often difficult to assess in-vivo, requiring the implementation of laborious and expensive experimental protocols. The aim of the present work was therefore to develop an artificial model of the ureter (i.e. ureter model, UM) to mimic the fluid dynamic environment in a stented ureter. The UM was designed to reflect the geometry of pig ureters, and to investigate the values of fluid dynamic viscosity (?), volumetric flow rate (Q) and severity of ureteric obstruction (OB%) which may cause critical pressures in the renal pelvis. The distributed obstruction derived by the sole stent insertion was also quantified. In addition, flow visualisation experiments and computational simulations were performed in order to further characterise the flow field in the UM. Unique characteristics of the flow dynamics in the obstructed and stented ureter have been revealed with using the developed UM. PMID:24498322

Clavica, Francesco; Zhao, Xuefeng; ElMahdy, Motaz; Drake, Marcus J.; Zhang, Xunli; Carugo, Dario

2014-01-01

81

Ectopic Ureter  

MedlinePLUS

... January 2011 You are leaving UrologyHealth.org. The Urology Care Foundation has no control over the content of this site. Click OK to proceed. Urology A - Z A Adrenal Gland Disorders Adrenal Medulla ...

82

Small cell neuroendocrine carcinoma of the ureter: A case report and literature review  

PubMed Central

Small cell neuroendocrine carcinoma arising in the ureter is extremely rare; only a few cases have been previously reported in the literature. The current study reports the case of a 65-year-old female who presented with right-sided back pain. A mass was identified in the right ureter, and a nephroureterectomy was performed. The microscopic examination revealed that the mass was composed of a monotonous population of small cells and that the cells of the carcinoma were positive for cluster of differentiation 56, chromogranin A and synaptophysin. The tumor was diagnosed as a ureteral neuroendocrine small cell carcinoma. The patient returned 4 months later with recurrences in the retroperitoneum. Chemotherapy was administered and following 80 mg/m2 intravenous irinotecan on days 1 and 8 and 25 mg/m2 cisplatin on days 1–3, every 21 days for 4 cycles, the tumor was considerably smaller. During the regular follow-up examinations, the tumor remained stable. PMID:24520292

PING, JIANG HAI; CHEN, ZHANG XIAO; JIONG, QIAN; HAN, YOU QI; NONG, XU

2014-01-01

83

Preliminary results of laser tissue welding in extravesical reimplantation of the ureters  

NASA Astrophysics Data System (ADS)

One future use of laparoscopic technology is in extravesical reimplantation of the ureters. Technical difficulty arises, however, when intracorporal fine suturing is necessary. We have assessed the efficacy of laser-activated fibrinogen solder to close vesical muscle flaps over submucosal ureters (Lich-Gregoir technique) in a canine model. Four dogs were subjected to unilateral flap closures via a protein solder consisting of indocyanine green and fibrinogen applied to the serosal surface of the bladder and exposed to 808 nm continuous wave diode laser energy. Contralateral reimplantation was performed using 4 - 0 vicryl muscle flap closures and served as controls. Urinary drainage catheters were left in place for 24 hours postoperatively. At 7 (n equals 1), 14 (n equals 2), and 28 (n equals 1) days following reimplantation, intravenous pyelograms confirmed bilateral renal function and ureteral patency. Disruption of wound closures were considered the point of wound dehiscence, vesical diverticulum, or leakage. At intravesical pressures above 100 cm H2O there was no evidence of wound disruption in either of the groups. However, surrounding normal tissue was noted to disrupt. In conclusion, laser-welded vesical wound closures appear at least as strong as suture closures in the canine model.

Kirsch, Andrew J.; Milton, Daniel T.; Dean, Gregory E.; Oz, Mehmet C.; Libutti, Steven K.; Treat, Michael R.; Nowygrod, Roman; Hensle, Terry W.

1993-07-01

84

A rare complication: misdirection of an indwelling urethral catheter into the ureter.  

PubMed

We report 3 patients with the rare complication of an indwelling urethral catheter misdirected into the ureter. This is the largest series to date. Patients were referred to us for a variety of reasons following exchange of their chronic indwelling urinary catheters. CT in all cases demonstrated the urinary catheters residing in the left ureter. The ages of the patients were 37, 67 and 81 years old. All patients suffered from neurogenic bladder. Two patients were female, one was male, and 2 of the 3 had a sensory disorder inhibiting their pain response. The catheters were replaced with open-end Foley catheters. Extensive follow-up CT scans were obtained in one case, demonstrating improvement of hydronephrosis and no evidence of ureteral stenosis. Cystoscopy in this patient demonstrated normally positioned and functioning ureteral orifices. Although the placement of an indwelling urethral catheter is a comparatively safe procedure, one must keep in mind that this complication can occur, particularly in female patients with neurogenic bladder. CT without contrast is a noninvasive, definitive diagnostic tool. PMID:24553489

Ishikawa, Tsutomu; Araki, Motoo; Hirata, Takeshi; Watanabe, Masami; Ebara, Shin; Watanabe, Toyohiko; Nasu, Yasutomo; Kumon, Hiromi

2014-01-01

85

[The inflammatory-reparative processes in the implantation of the ureter into the bladder by using the mechanical forces of permanent magnets].  

PubMed

An anastomosis between the ureter and the bladder using ring magnets was first made in our and foreign countries, Magnetic-compressive systems, based on alloy of samarium and cobalt (CS-37), were developed, taking into account their practical use in pediatric surgery. Morphological studies showed that the magnetic compressive procedure for connecting the ureter with the bladder has some advantages. PMID:8312560

Lubashevski?, V T; Shabanov, A M; Vasil'ev, G S

1993-11-01

86

Ultrasonic and Focused Shock-Wave Lithotrites: A Revolution in Treatment of Bladder, Kidney, and Ureter-Stones  

Microsoft Academic Search

ast, the extraction of calculi out of the urinary tract normally caused serious surgical procedures. In 1980 the ultrasonic lithotrite for the transurethral disintegration of bladder stones came into clinical use. During the last couple of years multiple instruments have been developed and the application has been broadened to percutaneous removal of kidney stones, transurethral disintegration of ureter stones, and

G. Flachenecker

1987-01-01

87

Vaginal Discharge Due to Undiagnosed Bilateral Duplicated Collecting System with Ectopic Ureters in a Three-Year-Old Female  

Microsoft Academic Search

In prepubertal girls with vaginal discharge, consideration of the etiology must be given to respiratory pathogens (Streptococcus pyogenes, Haemophilus influenzae, Staphylococcus aureus, Streptococcus pneumoniae, and Neisseria meningitidis), enteric pathogens (Escherichia coli, Shigella, and Yersinia), poor hygiene, foreign body, nonabsorbent undergarments, irritants, vulvar skin disease, anatomic abnormalities (double vagina with fistula, pelvic abscess, and ectopic ureter), and sexual abuse.1 Prepubertal girls,

Troy D Moon; Alana A Kennedy; Katherine M Knight

2002-01-01

88

Ectopic ureter, renal dysplasia, and recurrent epididymitis in an infant: case report and review of the literature  

PubMed Central

Key Clinical Message The most common etiologies of acute scrotum in boys <1 year of age are torsion of the testis or an appendix, urogenital anomalies, and epididymitis. We report an infant with recurrent epididymitis associated with single-system ectopic ureter opening into the seminal vesicle and dysplastic right kidney. Treatment included nephroureterectomy. PMID:25356227

Dudek-Warcho?, Teresa; Szmigielska, Agnieszka; Krzemie?, Gra?yna; Warcho?, Stanis?aw

2014-01-01

89

Robotic-assisted laparoscopic approach in the treatment for Zinner's Syndrome associated with ipsilateral megaureter and incomplete double-crossed ectopic ureter.  

PubMed

To report a rare congenital anomaly of the genitourinary tract, renal dysplasia is associated with ipsilateral incomplete duplicated ectopic ureter and seminal vesicle cyst in an adult, successfully treated with robotic-assisted laparoscopic approach. PMID:23529270

Altobelli, Emanuela; Bove, Alfredo Maria; Falavolti, Cristina; Sergi, Federico; Nguyen, Hiep T; Buscarini, Maurizio

2013-06-01

90

A rare presentation of the double inferior vena cava with an anomalous retrocaval right ureter: embryogenesis and clinical implications.  

PubMed

On dissection of the abdomen of an adult male cadaver, in addition to the normal inferior vena cava on the right side, an unusual venous channel which connected the left renal vein with the left common iliac vein was found; (probably the left inferior vena cava). The left testicular and the left suprarenal veins were opening into the left renal vein as usual. Other than this, a retrocaval ureter was found on the right side. The works of previous authors have highlighted the incidence of a venacaval duplication and its surgical implications, but here, we are presenting a unique case of a double inferior vena cava with an anomalous retrocaval ureter. A conglomeration of such vascular malformations is of immense surgical importance, and it is indicative of a grossly defective angiogenesis. Keeping in mind the clinical relevance of the variations which were observed, an attempt was made to explain them in the light of the embryogenic development. PMID:23634409

Gupta, Pratibha; Khullar, Meenakshi; Sharma, Ravikant; Singh, Richhpal

2013-03-01

91

Metastatic Prostate Adenocarcinoma Posing as Urothelial Carcinoma of the Right Ureter: A Case Report and Literature Review  

PubMed Central

This is a case report of a 67-year-old patient with distant metastasis of prostate cancer to the right ureter which caused hydronephrosis. At the beginning, both of the cytology of the morning urine and imaging findings were consistent with urothelial carcinoma. Nephroureterectomy was subsequently performed. Interestingly, the pathological examination of the excised ureter revealed that the malignancy was derived from the prostate. No skeletal metastasis was detected. However, after four months of follow-up, several abnormal signal shadows were reported in skeletal scintigraphy and the prostate specific antigen (PSA) was gradually increasing. We present such a case for its unique presentation. A review of the literature is also provided. PMID:25197608

Huang, Tian-bao; Yan, Yang; Liu, Huan; Che, Jian-ping; Wang, Guang-chun; Liu, Min; Zheng, Jun-hua; Yao, Xu-dong

2014-01-01

92

A Rare Presentation of the Double Inferior Vena Cava with an Anomalous Retrocaval Right Ureter: Embryogenesis and Clinical Implications  

PubMed Central

On dissection of the abdomen of an adult male cadaver, in addition to the normal inferior vena cava on the right side, an unusual venous channel which connected the left renal vein with the left common iliac vein was found; (probably the left inferior vena cava). The left testicular and the left suprarenal veins were opening into the left renal vein as usual. Other than this, a retrocaval ureter was found on the right side. The works of previous authors have highlighted the incidence of a venacaval duplication and its surgical implications, but here, we are presenting a unique case of a double inferior vena cava with an anomalous retrocaval ureter. A conglomeration of such vascular malformations is of immense surgical importance, and it is indicative of a grossly defective angiogenesis. Keeping in mind the clinical relevance of the variations which were observed, an attempt was made to explain them in the light of the embryogenic development. PMID:23634409

Gupta, Pratibha; Khullar, Meenakshi; Sharma, Ravikant; Singh, Richhpal

2013-01-01

93

An unusual combination of extra-adrenal pheochromocytoma and arteriovenous malformation of the ureter in a young adult  

PubMed Central

We present a case of a 24-year-old gentleman who presented with painless pan haematuria for 2?weeks. During the workup, he was diagnosed to have a retrocaval mass after a CT scan while cystoscopy revealed a polypoidal pulsating lesion in the left ureter. After surgical manipulation of the retrocaval mass, the blood pressure of the patient raised to 260/130?mm?Hg. It was completely resected and diagnosed as extra-adrenal pheochromocytoma (paraganglioma) after histopathology. The lesion in the ureter was completely excised and fulgurated and diagnosed as an arteriovenous malformation. To the best of our knowledge, this is the first patient to be presented in the literature with this unusual combination. PMID:23616332

Khawaja, Ali; Aziz, Wajahat; Nazim, Syed Muhammad; Abbas, Farhat

2013-01-01

94

Suprapubic transvesical single-port technique for control of lower end of ureter during laparoscopic nephroureterectomy for upper tract transitional cell carcinoma  

PubMed Central

Context: Various minimally invasive techniques – laparoscopic, endoscopic or combinations of both - have been described to handle the lower ureter during laparoscopic nephroureterectomy but none has received wide acceptance. Aims: We describe an endoscopic technique for the management of lower end of ureter during laparoscopic nephroureterectomy using a single suprapubic laparoscopic port. Materials and Methods: Transurethral resectoscope is used to make a full thickness incision in the bladder cuff around the ureteric orifice from 1 o’clock to 11 o’clock. A grasper inserted through the transvesical suprapubic port is used to retract the ureter to complete the incision in the bladder cuff overlying the anterior aspect of the ureteric orifice. The lower end of ureter is subsequently sealed with a clip applied through the port. This is followed by a laparoscopic nephrectomy and the specimen is removed by extending the suprapubic port incision. Our technique enables dissection and control of lower end of ureter under direct vision. Moreover, surgical occlusion of the lower end of the ureter prior to dissection of the kidney may decrease cell spillage. The clip also serves as a marker for complete removal of the specimen. Results: Three patients have undergone this procedure with an average follow up of 19 months. Operative time for the management of lower ureter has been 35, 55 and 40 minutes respectively. A single recurrence was detected on the opposite bladder wall after 9 months via a surveillance cystoscopy. There has been no residual disease or any other locoregional recurrence. Conclusions: The described technique for management of lower end of ureter during laparoscopic nephroureterectomy adheres to strict oncologic principles while providing the benefit of a minimally invasive approach. PMID:21814308

Ahlawat, Rajesh K.; Gautam, Gagan

2011-01-01

95

Percutaneous nephrolithotripsy and antegrade ureterolithotripsy in a 10-month-old infant with urinary stones in both kidney and ureter.  

PubMed

The prevalence of urinary tract stones in the pediatric population is lower than that in adults. Although methods of surgery and medical equipment have developed, medical treatments for urinary tract stones are limited for pediatric cases. We report the case of a 10-month-old male infant with urinary stones in the left kidney and ureter who underwent percutaneous nephrolithotripsy and ureterolithotripsy using antegrade insertion of a ureteroscope through the same nephrostomy tract. PMID:25252092

Naitoh, Yasuyuki; Yamada, Yasuhiro; Fujihara, Atsuko; Naya, Yoshio; Hongo, Fumiya; Kamoi, Kazumi; Okihara, Koji; Miki, Tsuneharu

2015-01-01

96

Bilateral Single Ectopic Ureters Draining Into a Grossly Dilated Vagina in an Adolescent Female  

PubMed Central

A 16-year-old female presented with dribbling of urine along with voluntary voiding since birth. Renal imaging revealed hydroureteronephrosis on the right side; the uterus and ovary were normal. A radionuclide scan showed a left nonfunctional kidney. On cystovaginoscopy, the urethra was shown to be normal and the urinary bladder was tubular with small capacity and an absent trigone. Although the vagina was capacious, no ureteric orifices were found. Computed tomography corroborated the diagnosis of bilateral, single ectopic ureters draining into a grossly dilated vagina. This case is unique because it is a bilateral single-system ureteral ectopia in a completely differentiated female genital tract that presented late in adolescence. To the best of our knowledge, this is the second such ureteral abnormality reported in the literature so far. The patient underwent ileocystoplasty with right ureteric reimplantation and nephroureterectomy for the left nonfunctional kidney, which histopathology showed to be tuberculosis. The patient is continent with cystometric capacity of more than 300 mL. PMID:23878693

Mandal, Soumendra Nath; Kamal, Mir Reza; Mukherjee, Satyadip; Das, Ranjit Kumar; Karmakar, Dilip

2013-01-01

97

Memokath Metallic Stent in the Treatment of Transplant Kidney Ureter Stenosis or Occlusion  

SciTech Connect

Purpose. To determine the efficacy of the Memokath 051 stent (Engineers and Doctors, Hornbaek, Denmark) in the treatment of recurrent ureteral stenosis or occlusion in transplant kidneys. Methods. From October 1985 through January 2004, 1,131 renal transplantations were performed at our center. Four patients who developed recurrent renal transplant ureter obstruction had nephrostomy catheters placed. Antegrade pyelography showed ureteral stenosis in three cases and complete occlusion in one patient. In each case, a Memokath 051 stent was inserted via an antegrade approach. Mean follow-up was 20 months (range 18-21 months). Creatinine levels were measured and ultrasonography was performed during follow-up. Results. All stent procedures were technically successful. During follow-up, one stent migrated within 10 days after stent insertion and was removed cystoscopically. Another stent had to be removed in the 14th month due to resistant infection, and was replaced with a new Memokath 051 stent which remained patent for another 8 months. The other two stents were fully patent at the 18th and 21st month of follow-up, respectively. Conclusion. Placement of a Memokath 051 stent appears to be a promising treatment alternative to balloon dilation, double-J stents and open surgical intervention for ureteral stenosis or occlusion in kidney transplant recipients. Further study of larger series is necessary.

Boyvat, Fatih, E-mail: fboyvat@baskent-ank.edu.tr, E-mail: boyvatf@yahoo.com; Aytekin, Cuneyt [Baskent University Faculty of Medicine, Department of Radiology (Turkey); Colak, Turan [Baskent University Faculty of Medicine, Department of Nephrology (Turkey); Firat, Ali [Baskent University Faculty of Medicine, Department of Radiology (Turkey); Karakayali, Hamdi; Haberal, Mehmet [Baskent University Faculty of Medicine, Department of General Surgery (Turkey)

2005-04-15

98

The Effect of Terpene Combination on Ureter Calculus Expulsion After Extracorporeal Shock Wave Lithotripsy  

PubMed Central

Purpose Terpene combination (Rowatinex) is known to help with the expulsion of urinary stones. The aim of this study was to determine how Rowatinex affects the expulsion of remnant stones after shock wave lithotripsy (SWL). Materials and Methods Clinical data were collected retrospectively from 499 patients with a diagnosis of ureteral stones who underwent SWL from January 2009 to August 2012. Ureteral stones were diagnosed in all patients by kidney, ureter, and bladder x-ray and abdominal computed tomography (CT). The progress of patients was documented every 2 weeks to confirm remnant stones after SWL. The patients with remnant stones underwent SWL again. Group 1 consisted of patients who were prescribed an analgesic, Tamsulosin 0.2 mg, and Rowatinex. Group 2 consisted of patients who were prescribed only an analgesic and Tamsulosin 0.2 mg. The expulsion rate of urinary stones was compared between groups. Results The expulsion rate of urinary stones was not significantly different between the two groups after 2 weeks. However, after 4 weeks, group 1 had a significantly higher expulsion rate (72.2% compared with 61.1%, p=0.022). Fifteen patients (10.2%) in group 1 and 40 (11.4%) in group 2 had to undergo ureteroscopic removal of the stone (p=0.756). Acute pyelonephritis occurred in one patient (0.7%) in group 1 and in one patient (0.3%) in group 2 (p=0.503). Conclusions The long-term administration of Rowatinex for 4 weeks increased the expulsion rate of urinary stones after SWL. PMID:24466395

Kim, Dai Hee; Goh, Hyeok Jun; Lee, Ho Won; Kim, Kyu Shik; Kim, Yong Tae; Moon, Hong Sang; Lee, Seung Wook

2014-01-01

99

DLG1 influences distal ureter maturation via a non-epithelial cell autonomous mechanism involving reduced retinoic acid signaling, Ret expression, and apoptosis.  

PubMed

The absence of Discs-large 1 (DLG1), the mouse ortholog of the Drosophila discs-large tumor suppressor, results in congenital hydronephrosis characterized by urinary tract abnormalities, reduced ureteric bud branching, and delayed disconnection of the ureter from the common nephric duct (CND). To define the specific cellular requirements for Dlg1 expression during urogenital development, we used a floxed Dlg1 allele and Pax2-Cre, Pax3-Cre, Six2-Cre, and HoxB7-Cre transgenes to generate cell type-restricted Dlg1 mutants. In addition, we used Ret(GFP) knockin and retinoic acid response element-lacZ transgenic mice to determine the effects of Dlg1 mutation on the respective morphogenetic signaling pathways. Mutation of Dlg1 in urothelium and collecting ducts (via HoxB7-Cre or Pax2-Cre) and in nephron precursors (via Pax2-Cre and Six2-Cre) resulted in no apparent abnormalities in ureteric bud branching or in distal ureter maturation, and no hydronephrosis. Mutation in nephrons, ureteric smooth muscle, and mesenchyme surrounding the lower urinary tract (via the Pax3-Cre transgene) resulted in congenital hydronephrosis accompanied by reduced branching, abnormal distal ureter maturation and insertion, and smooth muscle orientation defects, phenotypes very similar to those in Dlg1 null mice. Dlg1 null mice showed reduced Ret expression and apoptosis during ureter maturation and evidence of reduced retinoic acid signaling in the kidney. Taken together, these results suggest that Dlg1 expression in ureter and CND-associated mesenchymal cells is essential for ensuring distal ureter maturation by facilitating retinoic acid signaling, Ret expression, and apoptosis of the urothelium. PMID:24699546

Kim, Sung Tae; Ahn, Sun-Young; Swat, Wojciech; Miner, Jeffrey H

2014-06-15

100

Results of a Seven-Year, Single-Centre Experience of the Long-Term Outcomes of Bovine Ureter Grafts Used as Novel Conduits for Haemodialysis Fistulas  

Microsoft Academic Search

Purpose  To report the long-term outcomes of bovine ureter grafts as novel conduits for haemodialysis fistulas.\\u000a \\u000a \\u000a \\u000a Materials and Methods  Thirty-five patients underwent placement of a total of 40 SynerGraft 100 (SG100; CryoLife Europa®, Guildford, UK) bovine ureter grafts between April 2002 and February 2009. Prospective data were collected on all patients,\\u000a including active surveillance with blood flow studies and 6-monthly duplex ultrasound

Neelan Das; Mark J. Bratby; Vivek Shrivastava; Alison J. Cornall; Christopher R. Darby; Philip Boardman; Susan Anthony; Raman Uberoi

101

Treatment of the Duplicated Ureter Injured Intraoperatively, Application of Kidney Transplant Techniques to the Urology Reconstruction Setting: Case Report and Review of the Literature  

Microsoft Academic Search

Clinically significant iatrogenic ureteral injuries, excluding ureteroscopy, are likely underreported but considered a rare occurrence in pelvic surgery. An intraoperative consult for double ureter injury has never been documented in the medical literature. Presented herein is a case of a 53-year-old female undergoing conversion from a laparoscopic to open sigmoid resection for diverticular disease. There was an injury to a

Jonathan I. Hakim; Amit Basu; Adam Luchey

2010-01-01

102

Delayed Detection of Injury to an Ectopic Ureter of a Duplicated Collecting System following Laparoscopic Radical Prostatectomy for Early Organ-Confined Prostate Cancer  

Microsoft Academic Search

In the era of early detection of organ-confined prostate cancer, guidelines support the fact that many patients will not need an aggressive staging work-up, to avoid unnecessary investigations. This strategy may lead to serious repercussions in rare incidences. We present a rare case of urinary extravasation following laparoscopic radical prostatectomy caused by injury of the upper pole ectopic ureter of

A. Ghazi; R. Zimmermann; G. Janetschek

2011-01-01

103

[Upper tract urothelial carcinoma associated with giant hydronephrosis due to ligation of a ureter: a case report].  

PubMed

A 73-year-old woman was referred to our hospital with a complaint of left lumbar backache. Computed tomography (CT) revealed left giant hydronephrosis containing high-density fluid suspected of hemorrhage in the renal pelvis and swelling of cervical and mediastinal lymph nodes. Positron emission tomography (PET)-CT showed a small high uptake lesion in the left kidney parenchyma, and cervical and mediastinal lymph nodes. Percutaneous pelvic puncture yielded discharge of hemorrhagic fluid with negative cytology. Preoperative diagnosis was left giant hydronephrosis due to ligation of a left ureter at uterine myomectomy 43 years ago with renal hemorrhage caused by recent back injury, and cervical and mediastinal lymph node involvement of unknown origin. Because severe lumbar backache persisted, we performed palliative left nephrectomy and biopsy of cervical lymph nodes. The pathological diagnosis was invasive urothelial carcinoma with squamous differentiation and lymph node involvement. PMID:24759501

Kuromoto, Akito; Namiki, Shunichi; Satake, Yohei; Yamashita, Shinichi; Mitsutzuka, Koji; Saito, Hideo; Kaiho, Yasuhiro; Arai, Yoichi

2014-03-01

104

A novel ureter dilatation method for replacing hydromantic perfusion pump during ureteroscopic lithotripsy in patients with ureteral calculi and ibroepithelial polyps  

PubMed Central

This study aimed to evaluate the clinical value of a novel ureter dilatation method during ureteroscopic pneumatic lithotripsy in patients with ureteral calculi and polyps. Clinical information of 86 patients with ureter calculi and polyps who underwent ureteroscopic pneumatic lithotripsy was reviewed. A cavity-distention machine was used in 44 cases to inject normal saline for keeping clear operation view (cavity-distention machine-assisted group). A high handled water bag with artificial water injection (traditional pneumatic lithotripsy group) was used in 42 cases. The total operation time, time of stone removal, stone clearance rate and surgery complications were compared between two groups. All operations were successful with no patients transferred to open surgery. No ureter breakage or avulsion occurred in two groups. Two patients in traditional pneumatic lithotripsy group suffered from ureter perforation. In cavity-distention machine-assisted group and traditional pneumatic lithotripsy group, the total operation time was 30.1±4.8 min and 36.2±6.0 min, respectively (t=-5.22, P<0.01); the time of stone removal was 6.4±1.3 min and 9.3±1.5 min, respectively (t=-9.59, P<0.01); the stone clearance rate was 100% (44/44) and 95.2% (40/42; upper ureter stone immigrated to the renal pelvis in 2, and extraorgan shock wave lithotripsy was performed), respectively. Thus, intraoperative infusion of saline with a cavity-distention machine may replace the hydromantic perfusion pump to maintain a clear operation view and favor the stone removal in lesser time. This method has important clinical value in the treatment of ureteral calculi and polyps. PMID:24753755

Li, Tengcheng; Fang, Youqiang; Wu, Jieying; Zhou, Xiangfu

2014-01-01

105

Dystopic dysplastic kidney with ectopic ureter: improved localization by fusion of MR urography and (99m)Tc-DMSA SPECT datasets.  

PubMed

We report a 12-year-old girl with a long history of constant urinary dribbling and apparently only a left kidney. Using a multimodality approach involving the fusion of MR urography and (99m)Tc-dimercaptosuccinic acid (DMSA) SPECT datasets, it was finally possible to exactly localize the very small dystopic, dysplastic right kidney and its ectopic ureter draining into the vagina. PMID:18026947

Kreissl, Michael C; Lorenz, Reinhard; Ohnheiser, Gerd; Darge, Kassa

2008-02-01

106

Correlation of Traditional Point a With Anatomic Location of Uterine Artery and Ureter in Cancer of the Uterine Cervix  

SciTech Connect

Purpose: Point A, used for dose specification for intracavitary brachytherapy for cervical cancer, is the point at which the uterine artery and ureter cross. This study assessed compatibility of commonly used traditional point A (TPA) and actual anatomic point A (APA). Methods and Materials: We visualized and placed radiopaque clips at the APA during pelvic and paraaortic lymphadenectomy in 11 patients with cervical carcinoma. Orthogonal and oblique radiographs were obtained after insertion of brachytherapy applicators. We measured the distance between the TPA and APA and estimated the brachytherapy dose to each of the two points. Results: A total of 64 brachytherapy treatments were performed. The mean distances between the TPA and APA were 5.2 {+-} 1.0 cm on the right and 5.4 {+-} 1.1 cm on the left. The estimated brachytherapy doses delivered to the APA as a percentage of the presumed 500-cGy fraction size to the TPA were 35.2% (176.6 {+-} 59.0 cGy) on the right and 30.0% (150.2 {+-} 42.9 cGy) on the left. The marked discrepancy in the position of the two points was not related to individual kinetic variations during brachytherapy treatment, tumor size, or bladder filling. Conclusions: The conventional TPA does not provide an accurate estimate of the APA determined during lymphadenectomy, indicating a need to reevaluate the current practice for determining the brachytherapy prescription for cervical cancer. ( (ClinicalTrials.gov) Identifier, NCT00319462)

Wang, K.-L. [Department of Obstetrics and Gynecology, Mackay Memorial Hospital, Taipei, Taiwan (China); Department of Health Care Management, National Taipei College of Nursing, Taipei, Taiwan (China); Department of Early Childhood Care and Education, Mackay Medicine, Nursing, and Management College, Taipei, Taiwan (China); Yang, Y.-C. [Department of Obstetrics and Gynecology, Mackay Memorial Hospital, Taipei, Taiwan (China); Department of Obstetrics and Gynecology, Taipei Medical University, Taipei, Taiwan (China); Department of Early Childhood Care and Education, Mackay Medicine, Nursing, and Management College, Taipei, Taiwan (China); Chao, K. S. Clifford [Department of Radiation Oncology, University of Texas, M. D. Anderson Cancer Center, Houston, TX (United States)], E-mail: cchao@mdanderson.org; Wu, M.-H.; Tai, H.-C. [Department of Radiation Oncology, Mackay Memorial Hospital, Taipei, Taiwan (China); Chen, T.-C.; Huang, M.-C.; Chen, J.-R. [Department of Obstetrics and Gynecology, Mackay Memorial Hospital, Taipei, Taiwan (China); Su, T.-H. [Department of Obstetrics and Gynecology, Mackay Memorial Hospital, Taipei, Taiwan (China); Department of Early Childhood Care and Education, Mackay Medicine, Nursing, and Management College, Taipei, Taiwan (China); Chen, Y.-J. [Department of Radiation Oncology, Mackay Memorial Hospital, Taipei, Taiwan (China); Graduate Institute of Sport Coaching Science, Chinese Culture University, Taipei, Taiwan (China)], E-mail: chenmdphd@yahoo.com

2007-10-01

107

[Histology and histochemistry of the kidney and ureters of the Caiman crocodilus yacare (Daudin, 1802)--Crocodilia Reptilia)].  

PubMed

The elongated kidneys of Caiman crocodilus yacare are found in pairs and have two lobes. Each lobe is crossed lengthwise down the middle by the renal vein and artery along which there are the renal corpuscules in groups of two or four which delimit the medullar renal region. These corpuscules are generally poorly developed and there is a center of connective tissue with few capillary loops. The Bowman capsule is of pavement or cubic epithelium and leads into a narrow, short, non-secretory neck segment composed of cubical cells followed by tubulus contortus with brush borders against the lumen and the distal tubule with cubic epithelium brush borders. In the renal cortical region are the median tubulus with cylindrical and granular epithelium and the smaller collecting canals which flow into larger collecting canals which flow along the renal border. Among the various tubular parenchyma segments there is a network of blood vessels which lead into the renal vein and into a renal afferent vein. Abundant fat granular bodies and lipid droplets are observed in the proximal and median tubules. The collecting canals and ureters show PAS positive granules in their cells. PMID:7569146

Jin, S M; Rodrigues, A M; de Souza, A C

1995-02-01

108

Delayed detection of injury to an ectopic ureter of a duplicated collecting system following laparoscopic radical prostatectomy for early organ-confined prostate cancer.  

PubMed

In the era of early detection of organ-confined prostate cancer, guidelines support the fact that many patients will not need an aggressive staging work-up, to avoid unnecessary investigations. This strategy may lead to serious repercussions in rare incidences. We present a rare case of urinary extravasation following laparoscopic radical prostatectomy caused by injury of the upper pole ectopic ureter of an undetected duplex system on 1 side, an injury which is the first of its kind in laparoscopic urology. PMID:21071918

Ghazi, A; Zimmermann, R; Janetschek, G

2011-01-01

109

Right sided double inferior vena cava with obstructed retrocaval ureter: Managed with single incision multiple port laparoscopic technique using "Santosh Postgraduate Institute tacking ureteric fixation technique".  

PubMed

Right double inferior vena cava with obstructed retrocaval ureter is an extremely rare anomaly with only a few reported cases in the literature. To the best of our knowledge, this is the first case report describing ureteric repair by use of a single-incision laparoscopic technique. In addition, this report addresses the underlying surgical challenges of this repair and provides a brief review of the embryology of this anomaly. The "Santosh Postgraduate Institute ureteric tacking fixation technique" provides ease of end-to-end uretero-ureteric anastomosis in a single-incision laparoscopic surgery. PMID:25874048

Kumar, Santosh; Singh, Shivanshu; Garg, Nitin

2015-04-01

110

Right sided double inferior vena cava with obstructed retrocaval ureter: Managed with single incision multiple port laparoscopic technique using "Santosh Postgraduate Institute tacking ureteric fixation technique"  

PubMed Central

Right double inferior vena cava with obstructed retrocaval ureter is an extremely rare anomaly with only a few reported cases in the literature. To the best of our knowledge, this is the first case report describing ureteric repair by use of a single-incision laparoscopic technique. In addition, this report addresses the underlying surgical challenges of this repair and provides a brief review of the embryology of this anomaly. The "Santosh Postgraduate Institute ureteric tacking fixation technique" provides ease of end-to-end uretero-ureteric anastomosis in a single-incision laparoscopic surgery.

Singh, Shivanshu; Garg, Nitin

2015-01-01

111

Injury - kidney and ureter  

MedlinePLUS

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112

Effect of laser wavelength and protein solder concentration on acute tissue repair using laser welding: initial results in a canine ureter model.  

PubMed

Successful tissue approximation can be performed using low power laser energy combined with human albumin solder. In vitro studies were undertaken to investigate the acute repair strengths achieved using different laser wavelengths. Furthermore, we evaluated the change in repair strength with that resulted from changes in protein solder concentration. Intraluminal bursting pressure following ureterotomy repair was measured for the following laser wavelengths: 532, 808, 1,320, 2,100, and 10,600 nm. The tissue absorption characteristics of the 808-nm diode and the KTP-532-nm lasers required the addition of the exogenous chromophores indocyanine green and fluorescein, respectively. A 40% human albumin solder was incorporated in the repair of a 1.0-cm longitudinal defect in the canine ureter. Following determination of an optimal welding wavelength, human albumin solder of varying concentrations (25%, 38%, 45%, and 50%) were prepared and tested. The 1,320-nm YAG laser achieved the highest acute bursting pressure and was the most effective in this model. Of the concentrations of albumin tested, 50% human albumin yielded the greatest bursting pressures. We conclude that of the laser wavelengths evaluated, the 1,320-nm YAG achieves the strongest tissue weld in the acute ex vivo dog ureter model. In addition, when this laser system is used, the acute strength of a photothermal weld appears to be directly proportional to the concentration of human albumin solder in the range of 25 to 50%. PMID:9422452

Wright, E J; Poppas, D P

1997-01-01

113

Transcatheter Arterial Embolization Therapy for a Hypoplastic Pelvic Kidney with a Single Vaginal Ectopic Ureter to Control Incontinence: The Usefulness of Three-Dimensional CT Angiography Using Multidetector-Row Helical CT  

SciTech Connect

A girl with continuous urinary incontinence was successfully treated by angiographic embolization of a hypoplastic pelvic kidney with a single unilateral vaginal ectopic opening of the ureter. For this intervention, CT angiography was useful for detecting the corresponding renal artery of the hypoplastic kidney.

Kudoh, Kouichi, E-mail: cdk70770@par.odn.ne.jp; Kadota, Masataka; Nakayama, Yoshiharu; Imuta, Masanori; Yasuda, Tsuyoshi; Yamashita, Yasuyuki [Kumamoto University School of Medicine, Kumamoto, Department of Radiology (Japan); Inadome, Akito; Yoshida, Masaki; Ueda, Shouichi [Kumamoto University School of Medicine, Kumamoto, Department of Urology (Japan)

2003-09-15

114

Heterogeneity of neuronal and smooth muscle receptors involved in the VIP- and PACAP-induced relaxations of the pig intravesical ureter  

PubMed Central

The mechanisms and receptors involved in the vasoactive intestinal peptide (VIP)- and pituitary adenylate cyclase-activating polypeptide (PACAP)-induced relaxations of the pig intravesical ureter were investigated.VIP, PACAP 38 and PACAP 27 concentration-dependently relaxed U46619-contracted ureteral strips with a similar potency. [Ala11,22,28]-VIP, a VPAC1 agonist, showed inconsistent relaxations.The neuronal voltage-gated Ca2+ channel inhibitor, ?-conotoxin GVIA (?-CgTX, 1 ?M), reduced the VIP relaxations. Urothelium removal or blockade of capsaicin-sensitive primary afferents, nitric oxide (NO) synthase and guanylate cyclase with capsaicin (10 ?M), NG-nitro-L-arginine (L-NOARG, 100 ?M) and 1H-[1,2,4]-oxadiazolo[4,3-a]quinoxalin-1-one (ODQ, 5 ?M), respectively, did not change the VIP relaxations. However, the PACAP 38 relaxations were reduced by ?-CgTX, capsaicin, L-NOARG and ODQ.The VIP and VIP/PACAP receptor antagonists, [Lys1, Pro2,5, Arg3,4, Tyr6]-VIP (1 ?M) and PACAP (6–38) (0.4 ?M), inhibited VIP and VIP and PACAP 38, respectively, relaxations.The nonselective and large-conductance Ca2-activated K+ channel blockers, tetraethylammonium (3 mM) and charybdotoxin (0.1 ?M), respectively, and neuropeptide Y (0.1 ?M) did not modify the VIP relaxations. The small-conductance Ca2-activated K+ channel blocker apamin (1 ?M) did not change the PACAP 27 relaxations.The cAMP-dependent protein kinase A (PKA) blocker, 8-(4-chlorophenylthio)adenosine-3?,5?-cyclic monophosphorothioate (Rp-8-CPT-cAMPS, 100 ?M), reduced VIP relaxations. The phosphodiesterase 4 inhibitor rolipram and the adenylate cyclase activator forskolin relaxed ureteral preparations. The rolipram relaxations were reduced by Rp-8-CPT-cAMPS. Forskolin (30 nM) evoked a potentiation of VIP relaxations.These results suggest that VIP and PACAP relax the pig ureter through smooth muscle receptors, probably of the VPAC2 subtype, linked to a cAMP-PKA pathway. Neuronal VPAC receptors localized at motor nerves and PAC1 receptors placed at sensory nerves and coupled to NO release, seem also to be involved in the VIP and PACAP 38 relaxations. PMID:14662737

Hernández, Medardo; Barahona, María Victoria; Recio, Paz; Rivera, Luis; Benedito, Sara; Martínez, Ana Cristina; García-Sacristán, Albino; Orensanz, Luis M; Prieto, Dolores

2003-01-01

115

The effect of sodium-free and potassium-free solutions, ionic current inhibitors and ouabain on electrophysiological properties of smooth muscle of guinea-pig ureter.  

PubMed Central

1. The effects of Na-free and K-free solutions, tetraethyl ammonium (TEA), Mn2+, verapamil and ouabain on the electrophysiological properties of the smooth muscle cells of guinea-pig ureter have been studied, using the double sucrose-gap method. 2. TEA (5 mM) increased the amplitude and duration of both the initial spike component and the subsequent plateau of the action potential. The repetitive spike discharge on the plateau was abolished. The amplitude and duration of the phasic contraction was increased. The threshold for excitation was lowered while the resting potential and membrane resistance were unaffected. 3. In Na-free solution the duration of the action potential decreased mainly due to the suppression of the plateau. A similar effect was produced by exposure to K-free solution and also by ouabain. 4. Mn2+ (2 mM) suppressed the spike component and raised the threshold for excitation. The amplitude of the remaining part of the action potential was markedly increased but the contraction was rapidly abolished. The resting potential and membrane resistance were unchanged. When Mn2+ was added to Na-free solution it produced an increase in the amplitude and duration of the remaining part of the action potential but the phasic contraction was abolished. 5. Verapamil did not specifically block the fast component of the action potential but initially increased the amplitude of the spike and shortened the plateau. Subsequently, both the action potential and the phasic contraction became smaller. 6. The observations indicate that the phasic contractions are triggered by the initial spike component of the action potential, whereas the plateau is associated with the amplitude and particularly the duration of the contraction. PMID:845826

Shuba, M F

1977-01-01

116

Extrinsic Obstruction of the Ureter  

MedlinePLUS

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117

Expression of carbohydrate antigens (SSEA-1, sialyl-Lewis X, DU-PAN-2 and CA19-9) and E-selectin in urothelial carcinoma of the renal pelvis, ureter, and urinary bladder.  

PubMed

Carbohydrate antigens and E-selectin play important roles in the invasion and metastasis of cancers. We examined the expression of these antigens and their ligand protein, E-selectin, in urothelial carcinomas to evaluate whether their staining is correlated with the grade and stage of cancer. We studied the expression of carbohydrate antigens (type 1 and type 2 blood-group antigens) and E-selectin in urothelial carcinomas of the renal pelvis, ureter, and urinary bladder in 52 patients by staining SSEA-1 (LeX), sialyl LeX (sLeX), DU-PAN-2, CA19-9, and E-selectin with 5 different monoclonal antibodies (MAbs) to evaluate whether their staining correlated with cancer grade and stage. The differences between organs with regard to the degree of expression of these antigens were not evident. Type 2 antigens (SSEA-1 and sialyl LeX) are frequently expressed in the tumor cells regardless of atypical grade. The expression level of type 1 antigens (DU-PAN-2 and CA19-9) is lower than that of type 2 antigens. However, the presence of DU-PAN-2 tends to correlate with the grade of atypia; however, that of CA19-9 is inversely proportional to the grade of atypia. The lack of CA19-9 and appearance of DU-PAN-2 in urothelial carcinoma implies a high malignant potential. The expression of E-selectin can be correlated with stage and grade of tumor atypia. Type 2 antigen and E-selectin may be involved in tumor invasion and metastasis. PMID:16285609

Kajiwara, Hiroshi; Yasuda, Masanori; Kumaki, Nobue; Shibayama, Taro; Osamura, Yoshiyuki

2005-09-01

118

Use of computed tomography scout film and Hounsfield unit of computed tomography scan in predicting the radio-opacity of urinary calculi in plain kidney, ureter and bladder radiographs  

PubMed Central

Objective: The objective of this study is to determine the diagnostic utility of computed tomography (CT)- scout film with an optimal non-contrast helical CT scan Hounsfield unit (HU) in predicting the appearance of urinary calculus in the plain kidneys, ureter, urinary bladder (KUB)-radiograph. Methods: A prospective cross-sectional study was executed and data were collected from June 2007 to June 2012 at a tertiary hospital. The included subjects were diagnosed to have <10mm urolithiasis with non-contrast helical CT scan and KUB X-ray, which were carried out on the same day. Both KUB radiographs and CT-scout film were read by two qualified radiologists with inter-observer standardization prior to the study. Urolithiasis characteristics such as stone location, CT attenuation value, CT-scout film and KUB radiograph appearance were recorded independently by two observers. Univariate logistic analysis with receiver operating characteristic curve was generated to determine the best cut-off HU value of urolithiases not identified in CT-scout film, but determined radio-opaque in KUB X-ray. Subsequently, its sensitivity, specificity, predictive values and likelihood ratios were calculated. Statistical significance was set at P value of 0.05 or less. Results: Two hundred and three valid cases were included. 73 out of 75 CT-scout film detected urolithiasis were identified on plain radiograph and determined as radio-opaque. The determined best cut off value of HU utilized for prediction of radiographic characteristics was 630HU at which urinary calculi were not seen at CT-scout film and were KUB X-ray radio-opaque. The set HU cut-off was established of ideal accuracy with an overall sensitivity of 82.2%, specificity of 96.9% and a positive predictive value of 96.5% and negative predictive value of 83.5%. Conclusion: Urolithiases identified on the CT-scout film were also seen as radiopaque on the KUB radiograph while those stones not visible on the CT-scout film, but above the optimal HU cut-off value of 630 are also likely to be radiopaque. PMID:25125894

Chua, Michael E.; Gomez, Odina R.; Sapno, Lorelei D.; Lim, Steve L.; Morales, Marcelino L.

2014-01-01

119

Ultrasound: Renal (Kidneys, Ureters, Bladder) (For Parents)  

MedlinePLUS

... kidney area and images are recorded on a computer. The black-and-white images show the internal ... the images can be seen clearly on the computer screen. A technician (sonographer) trained in ultrasound imaging ...

120

The So-Called Meg a ureter Megacystis Syndrome  

Microsoft Academic Search

Megaureter-megacystis describes the appearance of the urinary tract in children with massive primary vesicoureteric reflux and its sequellae. The initial symptoms, radiographic findings, diagnostic misconceptions, and treatment for 22 male children are discussed. Incorrect diagnoses, including obstruction, neurogenic bladder dysfunc- tion, and ' 'megacystis, ' ' were made in 16 children; treatment was inappropriate in 14. In only eight boys

Ulrich V. Willi; Robert L. Lebowitz

1979-01-01

121

Bilateral transection of ureters secondary to gunshot wound to abdomen.  

PubMed

An unusual case in which a complete bilateral ureteral transection due to a single low velocity gunshot wound occurred. This case illustrates that in gunshot wounds to the abdomen involving the retroperitoneum, ureteral inspection is imperative especially in view of the fact that preliminary diagnostic workup during trauma resuscitation may be inadequate. PMID:3773005

Cecconi, R D; Lloyd, L; Hawasli, A; DiLoreto, R

1986-10-01

122

Angiotensin type 2 receptor is important in the normal development of the ureter  

Microsoft Academic Search

In humans, the actions of angiotensin II are transduced through the AT1 and AT2 receptors which have recently been implicated\\u000a in renal organogenesis. Polymorphisms in the human angiotensin II receptor genes have been linked to cardiovascular and nephrological\\u000a disorders. In this study we evaluated 35 patients with either primary obstructive megaureter or posterior urethral valves.\\u000a Each was genotyped for the

K. Hohenfellner; Tracy E. Hunley; Carde Schloemer; Walburgis Brenner; Elizabeth Yerkes; Fred Zepp; Valentina Kon

1999-01-01

123

Robotic-assisted laparoscopic approaches to the ureter: Pyeloplasty and ureteral reimplantation  

PubMed Central

Introduction and Objectives: The benefits of robotic surgery when compared to standard laparoscopy have been well established, especially when it comes to reconstructive procedures. The application of robotic technology to laparoscopic pyeloplasty has reduced the steep learning curve associated with the procedure. Consequently, this has allowed surgeons who are less experienced with laparoscopy to offer this treatment to their patients, instead of referring them to centers of excellence. Robotic pyeloplasty has also proved useful for repairing secondary UPJO, a procedure which is considered extremely difficult using a conventional laparoscopic approach. Finally, the pursuit of scarless surgery has seen the development of laparoendoscopic single site (LESS) procedures. The application of robotics to LESS (R-LESS) has also reduced the difficulty in performing conventional LESS pyeloplasty. Herein we present a literature review with regards to robotic-assisted laparoscopic pyeloplasty. We also discuss the benefits of robotic surgery with regards to reconstruction of the lower urinary tract. Materials and Methods: A systematic literature review was performed using PubMed to identify relevant studies. There were no time restrictions applied to the search, but only studies in English were included. We utilized the following search terms: Ureteropelvic junction obstruction and laparoscopy; laparoscopic pyeloplasty; robotic pyeloplasty; robotic ureteric reimplantation; robotic ureteroneocystostomy; robotic boari flap; robotic psoas hitch. Results: There has been considerable experience in the literature with robotic pyeloplasty. Unfortunately, no prospective randomized studies have been conducted, however there are a number of meta analyses and systematic reviews. While there are no clear benefits when it comes to surgical and functional outcomes when compared to standard laparoscopic pyeloplasty, it is clear that robotics makes the operation easier to perform. There is also a benefit to the robotic approach when performing a redo-pyeloplasty. Robotic pyeloplasty has also been applied to the pediatric population, and there may be a benefit in older children while in very young patients, retroperitoneal open pyeloplasty is still the gold standard. In the field of single incision surgery R-LESS is technically easier to perform than conventional LESS. However, the design of the current robotic platform is not completely suited for this application, limiting its utility and often requiring a larger incision. Optimized R-LESS specific technology is awaited. What is clear, from a number of analyses, is that robotic pyeloplasty is considerably more expensive than the laparoscopic approach, largely due to costs of instrumentation and the capital expense of the robot. Until cheaper robotic technology is available, this technique will continue to be expensive, and a cost-benefit analysis must be undertaken by each hospital planning to undertake this surgery. Finally, the benefits of upper tract reconstruction apply equally to the lower tract although there is considerably less experience. However, there have been a number of studies demonstrating the technical feasibility of ureteral reimplantation. Conclusions: Robotic-assisted laparoscopic pyeloplasty is gaining popularity, likely due to the shorter learning curve, greater surgeon comfort, and easier intracorporeal suturing. This has allowed more surgeons to perform the procedure, improving accessibility. Robotic technology is also beneficial in the field of LESS. Nevertheless, the procedure still is not as cost-effective as the conventional laparoscopic approach, and until more affordable robotic technology is available, it will not be universally offered. PMID:25097316

Samarasekera, Dinesh; Stein, Robert J.

2014-01-01

124

An ectopic ureter of a duplicated system presenting as a pelvic collection following laparoscopic radical prostatectomy.  

PubMed

Radical prostatectomy remains the gold-standard surgical treatment for clinically localized prostate cancer. Contrast imaging of the upper urinary tract is not part of the routine work-up of the patient before radical prostatectomy. This may lead to rare, albeit serious complications when anatomical anomalies are present. This article reports a case of delayed anastomotic leakage following radical prostatectomy due to an unrecognized duplex system on the left side and inclusion of the ureteric orifice draining the upper moiety in the anastomosis, which caused failure of healing and persistent leakage. PMID:23035770

Minh, Hoangdo; Qazi, Hasan Abdur Rahman; Dietel, Anja; Stolzenburg, Jens-Uwe

2013-08-01

125

Atlantic cod is a common host for myxosporeans, few reported as pathogens eg. Myxobolus aeglefini Auerbach, 1906 (Kabata, 1957)  

E-print Network

in middle trunk kidney Occlusion of collecting ducts & ureters Ureter in head kidney Collecting duct in posterior kidney Ureter in posterior kidney Massive to the epithelium, discharging into the luminal space Ureter in posterior kidney #12

Kane, Andrew S.

126

A case of didelphic uterus and blind hemivagina with renal dysplasia and ectopic ureter presenting with vulvodynia and recurrent fever  

Microsoft Academic Search

Didelphic uterus with blind hemivagina and ipsilateral renal anomaly is a rare congenital malformation. The pathogenesis of\\u000a this syndrome and its embryologic origin are still the subject of discussion. Due to the variable clinical picture and low\\u000a index of suspicion, diagnosis is often delayed or inaccurate. Conservative surgical treatment—excision of the obstructing\\u000a vaginal septum and marsupialization of the blind hemivagina—is

Elke Stevens; Jan Baekelandt; Lutgarde Lemmens; Els Dufraimont; André Valcke; Marcel De Bruyn; Jan Bosteels

2010-01-01

127

Minimally invasive techniques for management of the ureterocele and ectopic ureter: upper tract versus lower tract approach.  

PubMed

The optimal management approach for children with ureterocele and complete pyeloureteral duplication, especially in the setting of high-grade ipsilateral vesicoureteral reflux, remains unclear. Trends in surgical management reflect a shift from single-stage open reconstruction toward conservative management and minimally invasive approaches. This article reviews lower tract approaches (endoscopic ureterocele incision and ipsilateral ureteroureterostomy), and upper tract approaches (ureterocele moiety heminephrectomy) in terms of selected operative techniques, patient selection, published outcomes, postoperative care, and follow-up. Current data support endoscopic puncture as a safe and effective treatment of symptomatic children with single-system intravesical ureteroceles. PMID:25455173

Timberlake, Matthew D; Corbett, Sean T

2015-02-01

128

MP/H Rules Presentation - Urinary  

Cancer.gov

1 Renal Pelvis, Ureter, Bladder and Other Urinary 2 Equivalent Terms, Definitions, Tables and Illustrations 3 Introduction • Change in groupings – Previous: Kidney, ureter, renal pelvis • Bladder, ureter, renal pelvis – Lower urinary tract – Lined by

129

A case with fistula formation between a perinephric retroperitoneal abscess, a ureter and a descending colon: Successful outcome after conservative management  

PubMed Central

A 72-year-old man diagnosed with hydronephrosis and perinephric abscess because of an impacted urinary stone in the left uretero-pelvic junction was admitted to hospital with high-grade fever. The insertion of a percutaneous drain improved his general condition. Then, imaging from the percutaneous drainage tube revealed a fistula formation between the cavity of the perinephric retroperitoneal abscess, the descending colon, and the left renal pelvis. The patient received conservative management, including insertion of a percutaneous drain, discontinuation of oral intake and antimicrobial chemotherapy. Three days after the percutaneous drainage and discontinuation of oral intake, imaging revealed no apparent fistula. Fistula formation between a perinephric abscess and the descending colon is very rare; this is the first case of a long-term favourable outcome by conservative management. PMID:25295138

Iwamoto, Yoichi; Kato, Masafumi

2014-01-01

130

Cystoscopy and Ureteroscopy  

MedlinePLUS

... stone in the urinary tract, such as a kidney stone an unusual growth, polyp, tumor, or cancer in ... by an abnormal narrowing of the ureter a kidney stone in the ureter an unusual growth, polyp, tumor, ...

131

Bladder augmentation: Distal ureterocystoplasty with proximal ureteric reimplantation: A novel technique  

PubMed Central

A novel technique of bladder augmentation is reported, wherein the distal dilated ends of tortuous ureters were used for ureterocystoplasty while proximal remaining ureters reimplanted back into the native bladder. PMID:23243369

Babu, Ramesh; Ragoori, Deepak

2012-01-01

132

Trastuzumab and Combination Chemotherapy in Treating Patients With Locally Recurrent or Metastatic Urinary Tract Cancer  

ClinicalTrials.gov

Metastatic Transitional Cell Cancer of the Renal Pelvis and Ureter; Recurrent Bladder Cancer; Recurrent Transitional Cell Cancer of the Renal Pelvis and Ureter; Squamous Cell Carcinoma of the Bladder; Stage IV Bladder Cancer; Transitional Cell Carcinoma of the Bladder

2013-01-11

133

Gemcitabine Hydrochloride and Cisplatin With or Without Bevacizumab in Treating Patients With Advanced Urinary Tract Cancer  

ClinicalTrials.gov

Bladder Urothelial Carcinoma; Distal Urethral Carcinoma; Infiltrating Bladder Urothelial Carcinoma Associated With Urethral Carcinoma; Metastatic Urothelial Carcinoma of the Renal Pelvis and Ureter; Proximal Urethral Carcinoma; Recurrent Bladder Carcinoma; Recurrent Prostate Carcinoma; Recurrent Urethra Carcinoma; Recurrent Urothelial Carcinoma of the Renal Pelvis and Ureter; Regional Urothelial Carcinoma of the Renal Pelvis and Ureter; Stage IV Bladder Cancer; Stage IV Prostate Cancer; Stage IV Urethral Cancer; Ureter Carcinoma

2015-03-09

134

Eribulin Mesylate in Treating Patients With Locally Advanced or Metastatic Cancer of the Urothelium and Kidney Dysfunction  

ClinicalTrials.gov

Distal Urethral Carcinoma; Infiltrating Bladder Urothelial Carcinoma Associated With Urethral Carcinoma; Metastatic Urothelial Carcinoma of the Renal Pelvis and Ureter; Proximal Urethral Carcinoma; Recurrent Bladder Carcinoma; Recurrent Urethra Carcinoma; Recurrent Urothelial Carcinoma of the Renal Pelvis and Ureter; Regional Urothelial Carcinoma of the Renal Pelvis and Ureter; Stage III Bladder Cancer; Stage III Urethral Cancer; Stage IV Bladder Cancer; Stage IV Urethral Cancer; Ureter Carcinoma

2015-03-23

135

Iatrogenic ureteral lesions and repair: A review for gynecologists  

Microsoft Academic Search

Ureter injuries are a well-known complication of gynecologic surgery and a frequent cause of medicolegal problems. Because there are no randomized, controlled trials and the available studies are small series and case reports, the evidence on which to base treatment is weak. We therefore reviewed the complete English-language literature of ureter repair since 1990. In total, 608 ureter injuries were

Carlo De Cicco; Maria Lorena Ret Dávalos; Ben Van Cleynenbreugel; Jasper Verguts; Philippe Robert Koninckx

2007-01-01

136

Gemcitabine Hydrochloride and Cisplatin or High-Dose Methotrexate, Vinblastine, Doxorubicin Hydrochloride, and Cisplatin in Treating Patients With Urothelial Cancer  

ClinicalTrials.gov

Anterior Urethral Cancer; Localized Transitional Cell Cancer of the Renal Pelvis and Ureter; Posterior Urethral Cancer; Recurrent Bladder Cancer; Recurrent Urethral Cancer; Regional Transitional Cell Cancer of the Renal Pelvis and Ureter; Stage III Bladder Cancer; Transitional Cell Carcinoma of the Bladder; Ureter Cancer; Urethral Cancer Associated With Invasive Bladder Cancer

2014-01-27

137

Gemcitabine, Paclitaxel, Doxorubicin in Metastatic or Unresectable Bladder Cancer With Decreased Kidney Function  

ClinicalTrials.gov

Distal Urethral Cancer; Metastatic Transitional Cell Cancer of the Renal Pelvis and Ureter; Proximal Urethral Cancer; Recurrent Bladder Cancer; Recurrent Transitional Cell Cancer of the Renal Pelvis and Ureter; Recurrent Urethral Cancer; Regional Transitional Cell Cancer of the Renal Pelvis and Ureter; Stage III Bladder Cancer; Stage IV Bladder Cancer; Transitional Cell Carcinoma of the Bladder; Urethral Cancer Associated With Invasive Bladder Cancer

2014-09-03

138

Ureteric Duplication is not a Contraindication for Robot-Assisted Laparoscopic Radical Cystoprostatectomy and Intracorporeal Studer Pouch Formation  

PubMed Central

Objectives: Ureteric duplication is a rarely seen malformation of the urinary tract more commonly seen in females. Materials and Methods: We report 2 cases of robot-assisted laparoscopic radical cystoprostatectomy (RALRCP) with bilateral extended pelvic lymph node dissection and intracorporeal Studer pouch formation in patients with duplicated right ureters. Results: Two male patients (53 and 68 years old) underwent transurethral resection of a bladder tumor that revealed high-grade muscle invasive transitional cell carcinoma, with no metastases. We performed RALRCP and intracorporeal Studer pouch formation. A duplicated right ureter was observed during the procedures in both patients. Left ureter distal segment was spatulated 2cm long and anastomosed using running 4/0 Vicryl to the right ureter at its bifurcation where it forms a single lumen without spatulation. All 3 ureters were catheterized individually. A Wallace type uretero-ileal anastomosis was performed between the ureters and the proximal part of the Studer pouch chimney. Although ureteric frozen section analysis suggested ureteric carcinoma in situ in patient 1, postoperative pathologic evaluation was normal. Frozen section and final postoperative pathologic evaluations were normal in patient 2. Conclusions: Duplicated ureters might be underdiagnosed on CT. The presence of a duplicated ureter is not a contraindication to RALRCP and intracorporeal Studer pouch formation. The da Vinci-S surgical robot is very safe for performing this complicated procedure. Frozen section analysis of ureters during radical cystectomy for bladder cancer might not reliably diagnose the pathologic condition and might overestimate the disease in the ureters. PMID:22643522

Dogan, Bayram; Atmaca, Ali Fuat; Akbulut, Ziya; Balbay, Mevlana Derya

2011-01-01

139

Laparoscopic Ureteropyelostomy  

Microsoft Academic Search

Historically, the majority of the duplications of the ureter go unnoticed. Anomalies of duplication of the ureter with clinical\\u000a implications are less common. Incomplete duplication of the ureter with lower moiety ureteropelvic junction obstruction is\\u000a very uncommon. Patients present with recurrent loin pain and urinary tract infection. In cases of complete duplication, urinary\\u000a tract infection may be the presenting feature

M. Ramalingam; K. Selvarajan

140

Renal scan  

MedlinePLUS

... be due to: Acute or chronic kidney failure Chronic kidney infection (pyelonephritis) Complications of a kidney transplant Glomerulonephritis Hydronephrosis Injury of the kidney and ureter Narrowing ...

141

Unusual presentation of ectopic insertion of duplicated collecting system in an adult male.  

PubMed

Ectopic ureters are rare congenital mesonephric duct malformations with a higher prevalence in women than men. In women, ectopic ureters are often associated with a duplicated collecting system, whereas in men, ectopic ureters usually drain a single system and are associated with renal dysplasia and obstruction. Presentation and diagnosis generally occurs in the pediatric age group. Herein, we present an unusual case of delayed diagnosis of ectopic insertion of the upper pole ureter in a completely duplicated left kidney causing massive hydroureteronephrosis in an adult man. PMID:23540862

Ohmann, Erin L; Borofsky, Michael S; Han, Justin S; Huang, William C; Shah, Ojas

2013-06-01

142

Spontaneous Renal Pelvis Rupture: Unexpected Complication of Urolithiasis Expected to Passage with Observation Therapy  

PubMed Central

Seventy percent of ureteral stones are located at distal ureter. Effective and safe passage of distal ureter stones is mediated by observation or medical expulsive treatment. Most of stones located at distal ureter pass spontaneously under observation; however, some are complicated with urinary tract infection, hydronephrosis, and renal function disturbances. Spontaneous perforation of the upper ureter is a rare condition that poses diagnostic and therapeutic problems. This case is reported, because the patient developed an unexpected spontaneous renal pelvis rupture (SRPR), while she was under observation and expected to pass her right ureteral stone spontaneously through hydration and analgesic treatment. PMID:24195004

Tas, Tuncay; Cak?roglu, Basri; Aksoy, Süleyman Hilmi

2013-01-01

143

Study of Genes and Environment in Patients With Cancer in East Anglia, Trent, or West Midlands Regions of the United Kingdom  

ClinicalTrials.gov

Bladder Cancer; Brain and Central Nervous System Tumors; Esophageal Cancer; Intraocular Melanoma; Kidney Cancer; Lymphoma; Melanoma (Skin); Pancreatic Cancer; Transitional Cell Cancer of the Renal Pelvis and Ureter

2013-08-23

144

SIX1 acts synergistically with TBX18 in mediating ureteral smooth muscle formation  

PubMed Central

Dysfunction of the ureter often leads to urine flow impairment from the kidney to the bladder, causing dilation of the ureter and/or renal pelvis. Six1 is a crucial regulator of renal development: mutations in human SIX1 cause branchio-oto-renal (BOR) syndrome and Six1–/– mice exhibit renal agenesis, although the ureter is present. It remains unclear whether Six1 plays a role in regulating ureter morphogenesis. We demonstrate here that Six1 is differentially expressed during ureter morphogenesis. It was expressed in undifferentiated smooth muscle (SM) progenitors, but was downregulated in differentiating SM cells (SMCs) and had disappeared by E18.5. In Six1–/– mice, the ureteral mesenchymal precursors failed to condense and differentiate into normal SMCs and showed increased cell death, indicating that Six1 is required for the maintenance and normal differentiation of SM progenitors. A delay in SMC differentiation was observed in Six1–/– ureters. A lack of Six1 in the ureter led to hydroureter and hydronephrosis without anatomical obstruction when kidney formation was rescued in Six1–/– embryos by specifically expressing Six1 in the metanephric mesenchyme, but not the ureter, under control of the Eya1 promoter. We show that Six1 and Tbx18 genetically interact to synergistically regulate SMC development and ureter function and that their gene products form a complex in cultured cells and in the developing ureter. Two missense mutations in SIX1 from BOR patients reduced or abolished SIX1-TBX18 complex formation. These findings uncover an essential role for Six1 in establishing a functionally normal ureter and provide new insights into the molecular basis of urinary tract malformations in BOR patients. PMID:20110314

Nie, Xuguang; Sun, Jianbo; Gordon, Ronald E.; Cai, Chen-Leng; Xu, Pin-Xian

2010-01-01

145

Biomimetic Propulsion for a Swimming Surgical Micro-Robot  

E-print Network

would revolutionize kidney stone destruction if implemented, yet the design of the robot presents the design of a robot that swims inside the human ureter to destroy kidney stones non the correct ureter and find the kidney stones. Once it has found them, it needs to be capable of destroying

Sitti, Metin

146

Kidney Surgery Codes  

Cancer.gov

Kidney, Renal Pelvis, and Ureter Kidney C649, Renal Pelvis C659, Ureter C669 (Except for M9727, 9733, 9741-9742, 9764-9809, 9832, 9840-9931, 9945-9946, 9950-9967, 9975-9992) Codes 00 None; no surgery of primary site; autopsy ONLY 10 Local tumor

147

Trastuzumab in Treating Patients With Previously Treated, Locally Advanced, or Metastatic Cancer of the Urothelium  

ClinicalTrials.gov

Distal Urethral Cancer; Metastatic Transitional Cell Cancer of the Renal Pelvis and Ureter; Proximal Urethral Cancer; Recurrent Bladder Cancer; Recurrent Transitional Cell Cancer of the Renal Pelvis and Ureter; Recurrent Urethral Cancer; Stage IV Bladder Cancer; Transitional Cell Carcinoma of the Bladder; Urethral Cancer Associated With Invasive Bladder Cancer

2013-05-01

148

Early organogenesis of the kidney  

Microsoft Academic Search

The mammalian permanent kidney consists of three cell lineages of different origin: the epithelial cells of the ureter bud, the mesenchymal cells of the nephric blastema and the endothelial cells of the capillaries. Organogenesis is governed by a cascade of morphogenetic interactions between these cell populations, a reciprocal epithelial-mesenchymal interaction between the branching ureter and the metanephric mesenchyme, homotypic interactions

Lauri Saxén; Hannu Sariola

1987-01-01

149

Giant megaureters presenting as a multicystic abdominal mass.  

PubMed

Megaureter is a developmental anomaly of the ureter, which is associated with significant morbidity in children and frequently requires surgical intervention. I am presenting here a case of massively dilated ureters in a child that occupied almost the entire abdomen and was wrongly misinterpreted as a cystic lymphangioma due to its unusual presentation. PMID:18445905

Rastogi, Rajul

2008-05-01

150

Primary non-refluxing megaureters  

Microsoft Academic Search

Megaureters may be primary or secondary, and the dilatation may be due to obstruction or reflux, or both or neither. The cause of primary obstructed megaureter is the aperistaltic and narrowed pre-vesical portion of the ureter. The inner sheath of the terminal ureter generally shows a reduced amount of longitudinal smooth muscle bundles and an increased amount of collagen. Primary

E. Merlini; P. Spina

2005-01-01

151

Analysis and technical refinements of endoscopic treatment of vesico-ureteral reflux in children with a 40-month follow up  

Microsoft Academic Search

We report our experience with the endoscopic treatment of vesicoureteral reflux by submucosal injection of Teflon in children. During a period of 40 months, 450 children and a total of 678 ureters were treated; 606 ureters were available with a follow-up of more than 3 months and examined by cystography. The overall success rate was 84.2% after one injection and

P. Sauvagel; S. Geissl; R. Dhaouil; L. Marcellin; F. Becmeurl; D. Christmann; H. Nieva

1991-01-01

152

Detrusorrhaphy for repair of unilateral vesicoureteral reflux: report of 76 patients using a modified technique  

Microsoft Academic Search

Objective. To present our results for repair of unilateral vesicoureteral reflux in 76 children using a modified technique of detrusorrhaphy.Methods. A retrospective chart review was performed for 76 children who underwent repair of unilateral vesicoureteral reflux by a modified technique of detrusorrhaphy. Of the 76 refluxing ureters, 12 were associated with historically refluxing contralateral ureters. In addition, 72\\/76 were grades

Robert A. Mevorach; Paul A. Merguerian; Anthony H. Balcolm

1998-01-01

153

Possible pharmacological means of treating renal colic  

Microsoft Academic Search

The effects of various drugs on the partially obstructed ureter were investigated in a new model experiment which permitted the calculation of peripheral resistance. After the administration of noradrenaline, the local spasm of the ureter in the region of the obstruction was increased and the urinary flow fell. After administration of the a-blocker phentolamine and of the ß-receptor stimulant orciprenaline

H. J. Peters; W. Eckstein

1975-01-01

154

Ureteroscopic Lithotripsy Using Swiss Lithoclast for Treatment of Ureteral Calculi: 12-Years Experience  

PubMed Central

Ureteroscopic lithotripsy using Swiss Lithoclast was performed in 411 cases from January 1996 to September 2007 in a single hospital. Medical records of 341 cases, in which Swiss Lithoclast was successfully applied, were available for this retrospective study. We used 9.5Fr and 10Fr Storz rigid ureteroscopes. A success was defined as being free of stone-related symptoms and residual stones larger than 2 mm. Sixty one stones were located in the upper ureter, 49 stones were in the mid ureter, and 231 stones were in the lower ureter. The overall success rate was 93.5%. The success rate of upper ureter stone (80.3%) was significantly lower compared with those of mid (93.8%) and lower (96.9%) ureter stones (P=0.001). The higher the calculi was located within the ureter, the more chance of upward migration there was (P<0.001). The success rate in male patients was lower than in female patients without a statistical significance (P=0.068). The success rate decreased as the size of the stone increased (P<0.001), and as the degree of hydronephrosis increased (P=0.03). Perforation rates were 4.9%, 4.1%, and 2.6% from upper to lower ureter stone group. Ureteroscopic lithotripsy using Swiss Lithoclast is a safe and useful treatment modality for ureteral calculi. PMID:19654954

Park, Dong Soo

2009-01-01

155

An unusual case of ureteral tumor in a duplex system.  

PubMed

We report an interesting case of ureteral tumor involving both limbs of an incompletely duplicated ureter. Such a case has not been reported in the literature. A 51-year-old female presented with refractory hematuria. A complete evaluation revealed an incompletely duplicated right system with an isolated distal ureteral tumor extending proximally into both arms of the ureter. The patient underwent a successful right nephroureterectomy. Pathology revealed low grade papillary urothelial cancer confined to both arms of the ureter. A brief review of the literature and management is detailed herein. PMID:17136581

Boris, Ronald S; McIntire, Linda; AlAlassi, Osama; Peabody, James O; Savera, Adnan

2006-01-01

156

Percutaneous ureterostomy as an effective diversion in a newborn.  

PubMed

Ectopic ureter in a duplicated system in men is rare and rarely causes bilateral obstructive symptoms. The tendency of the ureter to dilate more than the caliceal system is unique to neonates and makes upper urinary diversions more challenging. However, alternative percutaneous diversions other than nephrostomy might be beared in mind in such cases with huge dilatation in ureters in suffering neonates. As discussed in this case percutaneous ureterostomy may be very effective and have a role in diagnosis and management of neonatal hydroureteronephrosis. PMID:16771739

Bilen, Cenk Y; Aygün, Canan; Ozkaya, Ozan; Aydin, O?uz; Gürmen, Nevzat; Sarikaya, Saban

2006-05-01

157

Adult and pediatric urology  

SciTech Connect

This book contains 32 chapters. Come of the chapter titles are: Imaging; Urinary tract infections; Calculus formation; Perioperative care; Renal injuries; Kidney stone surgery; Trauma to the lower urinary tract; renel cystic disease; Bladder cancer; and The ureter.

Gillenwater, J.Y.; Howards, S.S. (Univ of Virginia School of Medicine, Charlottsville, VA (US)); Grayhack, J.T. (Northwestern Univ. Medical School, Northwestern Memorial Hospital, Chicago, IL (US)); Ducket, J.W. (Univ of Pennsylvania School of Medicine, Children's Hospital of Philadelphia, Philadelphia, PA (US))

1987-01-01

158

Multiple endocrine neoplasia (MEN) II  

MedlinePLUS

... being overproduced. A physical examination may reveal: Enlarged lymph nodes in the neck Fever High blood pressure Rapid heart rate Thyroid nodules Imaging tests used to identify tumors may include: Abdominal CT scan Imaging of the kidneys or ureters MIBG ...

159

Observations on the Sexual Segment of the Kidney of Snakes with Emphasis on  

E-print Network

Scolecophidia, Lepto- typhlops dulcis, and from the more advanced Alethinophidia, species from the Acrochordidae of the SSK of the sea snake, Pelamis platurus. The SSK of L. dulcis does not include the ureter but does

Sever, David M.

160

Cystinuria  

MedlinePLUS

... rare condition in which stones made from an amino acid called cystine form in the kidney, ureter, and ... Cystinuria is caused by too much of an amino acid called cystine in the urine. After entering the ...

161

MPH Urinary Practicum : Breeze Training Transcript: Feb 20 07  

Cancer.gov

NATIONAL INSTITUTES OF HEALTH NATIONAL CANCER INSTITUTE SURVEILLANCE, EPIDEMIOLOGY AND END RESULTS (SEER) PROGRAM BREEZE SESSION Multiple Primary and Histology Coding Rules—Renal Pelvis, Ureter, Bladder and Other Urinary Sites Practicum February

162

MPH Urinary Rules: Breeze Training Transcript: Feb 16 07  

Cancer.gov

NATIONAL INSTITUTES OF HEALTH NATIONAL CANCER INSTITUTE SURVEILLANCE, EPIDEMIOLOGY AND END RESULTS (SEER) PROGRAM Breeze Session Multiple Primary and Histology Coding Rules—Renal Pelvis, Ureter and Bladder and Other Urinary Sites February 16, 2007

163

Laser lithotripsy with a Q-switched alexandrite laser system  

Microsoft Academic Search

The laser lithotripsy of ureter stones with the Alexan Triptor was introduced into urology in 1989. Pulsenergy, pulsewidth, wavelength, fiber performance, and endoscope performance are important parameters for effective stone disintegration.

Walter Uebelacker

1992-01-01

164

Observation of Ureteric Diameter in Negative Intravenous Urogram in Hospital Universiti Kebangsaan Malaysia  

PubMed Central

Background: This study observed the widest ureteric diameter in negative intravenous urogram (IVU) examinations using low osmolar contrast media. Methods: We reviewed a total of one hundred and eighty four ureters from 92 negative IVUs. Results: The results show a mean diameter for the abdominal ureter of 4.19 mm with an SD of 1.27 mm and a mean pelvic ureteric diameter of 4.45 mm with an SD of 1.37 mm. The upper limits for abdominal ureter and pelvic ureter based on a confidence interval of 95% were 4.37 mm and 4.64 mm, respectively. Conclusions: There was no significant difference between the right and left ureteric diameter in both female and male subjects. There was no significant correlation between ureteric diameters and the age of subjects, from the second to the eighth decades. PMID:22135531

Wong, Siong Lung; Abdul Hamid, Hamzaini

2010-01-01

165

Ureteral Disorders  

MedlinePLUS

... the ureter with a scope called a cystoscope. Treatment depends on the cause of the problem. It may include medicines and, in severe cases, surgery. NIH: National Institute of Diabetes and Digestive and Kidney Diseases

166

Laser lithotripsy with a Q-switched alexandrite laser system  

NASA Astrophysics Data System (ADS)

The laser lithotripsy of ureter stones with the Alexan Triptor was introduced into urology in 1989. Pulsenergy, pulsewidth, wavelength, fiber performance, and endoscope performance are important parameters for effective stone disintegration.

Uebelacker, Walter

1992-06-01

167

Renovascular Disease  

MedlinePLUS

... Enlarged Prostate) C Cancer of the Ureter and Renal Pelvis Circumcision Cloacal Exstrophy Complete Blood Count (CBC) Conn's Syndrome Continent Urinary Diversion Contrast and Radionuclide Cystography Cryptorchidism CT Scan Cushing's Syndrome Cystocele/Fallen Bladder Cystometry Cystoscopy ...

168

Kidney Cancer  

MedlinePLUS

... Enlarged Prostate) C Cancer of the Ureter and Renal Pelvis Circumcision Cloacal Exstrophy Complete Blood Count (CBC) Conn's Syndrome Continent Urinary Diversion Contrast and Radionuclide Cystography Cryptorchidism CT Scan Cushing's Syndrome Cystocele/Fallen Bladder Cystometry Cystoscopy ...

169

BPH: Surgical Management (Benign Prostatic Hyperplasia/Enlarged Prostate)  

MedlinePLUS

... Enlarged Prostate) C Cancer of the Ureter and Renal Pelvis Circumcision Cloacal Exstrophy Complete Blood Count (CBC) Conn's Syndrome Continent Urinary Diversion Contrast and Radionuclide Cystography Cryptorchidism CT Scan Cushing's Syndrome Cystocele/Fallen Bladder Cystometry Cystoscopy ...

170

Vaginal Anomalies: Vaginal Agenesis  

MedlinePLUS

... Enlarged Prostate) C Cancer of the Ureter and Renal Pelvis Circumcision Cloacal Exstrophy Complete Blood Count (CBC) Conn's Syndrome Continent Urinary Diversion Contrast and Radionuclide Cystography Cryptorchidism CT Scan Cushing's Syndrome Cystocele/Fallen Bladder Cystometry Cystoscopy ...

171

Kidney (Renal) Failure  

MedlinePLUS

... Enlarged Prostate) C Cancer of the Ureter and Renal Pelvis Circumcision Cloacal Exstrophy Complete Blood Count (CBC) Conn's Syndrome Continent Urinary Diversion Contrast and Radionuclide Cystography Cryptorchidism CT Scan Cushing's Syndrome Cystocele/Fallen Bladder Cystometry Cystoscopy ...

172

Male Infertility  

MedlinePLUS

... Enlarged Prostate) C Cancer of the Ureter and Renal Pelvis Circumcision Cloacal Exstrophy Complete Blood Count (CBC) Conn's Syndrome Continent Urinary Diversion Contrast and Radionuclide Cystography Cryptorchidism CT Scan Cushing's Syndrome Cystocele/Fallen Bladder Cystometry Cystoscopy ...

173

Prostate Cancer: Cryoablation Treatment  

MedlinePLUS

... Enlarged Prostate) C Cancer of the Ureter and Renal Pelvis Circumcision Cloacal Exstrophy Complete Blood Count (CBC) Conn's Syndrome Continent Urinary Diversion Contrast and Radionuclide Cystography Cryptorchidism CT Scan Cushing's Syndrome Cystocele/Fallen Bladder Cystometry Cystoscopy ...

174

Peyronie's Disease  

MedlinePLUS

... Enlarged Prostate) C Cancer of the Ureter and Renal Pelvis Circumcision Cloacal Exstrophy Complete Blood Count (CBC) Conn's Syndrome Continent Urinary Diversion Contrast and Radionuclide Cystography Cryptorchidism CT Scan Cushing's Syndrome Cystocele/Fallen Bladder Cystometry Cystoscopy ...

175

Prostate Cancer: Surgical Management  

MedlinePLUS

... Enlarged Prostate) C Cancer of the Ureter and Renal Pelvis Circumcision Cloacal Exstrophy Complete Blood Count (CBC) Conn's Syndrome Continent Urinary Diversion Contrast and Radionuclide Cystography Cryptorchidism CT Scan Cushing's Syndrome Cystocele/Fallen Bladder Cystometry Cystoscopy ...

176

Quadruplication of dystopic kidney in combination with ureteral cyst.  

PubMed

A case of ureteral quadruplication associated with renal dystopia is described. Four ureters drained into ureteric cyst and distal monoureter opened into the bladder. The literature concerned this extremely rare malformation is reviewed. PMID:19040913

Koszutski, Tomasz; Kudela, Grzegorz; Mikosi?ski, Miros?aw; Utrata, Wojciech

2008-12-01

177

Enuresis (Bed-Wetting)  

MedlinePLUS

... their development. Bed-wetting is more common among boys than girls. What causes bed-wetting? A number of things ... valves in boys or in the ureter in girls or boys Abnormalities in the spinal cord A small bladder ...

178

Laparoscopic Repair of a Ureteric Sciatic Hernia: Report of a Case  

PubMed Central

Ureteric sciatic hernias are extremely rare. Here we report a case of a 78-year-old woman presented with colicky left abdominal pain. Computed tomography revealed a ureteric sciatic hernia, and drip infusion pyelography revealed dilated left ureter with herniation of the ureter into the sciatic foramen. The hernia was successfully repaired laparoscopically. We have described the diagnosis and management of the patient, followed by a review of the literature on sciatic hernias. PMID:24778894

Saisu, Kazuhiro; Tsuru, Nobuo; Homma, Yukio; Ihara, Hiroyuki

2014-01-01

179

A Giant Pedunculated Urothelial Polyp Mimicking Bladder Mass in a Child: A Rare Case  

PubMed Central

Ureteral fibroepithelial polyps are rarely seen benign tumors with mesodermal origin. These polyps can involve kidney, pelvis, ureter, bladder, and urethra. The most common symptoms are hematuria and flank pain. The choice of treatment is either endoscopic or surgical resection of polyp by sparing kidney. Here, we presented a pediatric case with giant, fibroepithelial polyp that mimics bladder tumor, originating from middle segment of the ureter. PMID:24716071

Kaba, Mehmet; Kaba, Sultan; Kaya, Tacettin Yekta; Eren, Hüseyin; Pirinççi, Necip

2014-01-01

180

An unusual case of ureteral tumor in a duplex system  

Microsoft Academic Search

We report an interesting case of ureteral tumor involving both limbs of an incompletely duplicated ureter. Such a case has\\u000a not been reported in the literature. A 51-year-old female presented with refractory hematuria. A complete evaluation revealed\\u000a an incompletely duplicated right system with an isolated distal ureteral tumor extending proximally into both arms of the\\u000a ureter. The patient underwent a

Ronald S. Boris; Linda McIntire; Osama AlAlassi; James O. Peabody; Adnan Savera

2006-01-01

181

Familial ureteral abnormalities syndrome: genomic mapping, clinical findings  

Microsoft Academic Search

.   Abnormal development of the ureter during embryogenesis, when occurring in multiple family members, appears to be a genetically\\u000a determined defect with autosomal dominant inheritance and high penetrance, which can lead to significant kidney damage, renal\\u000a failure, and death. We have studied 48 individuals within a large kindred in which ureteral-related abnormalities (including\\u000a vesicoureteral reflux, ureteropelvic junction obstruction, duplicated ureters,

LuAnn Klemme; Alfred J. Fish; Stephen Rich; Beryl Greenberg; Beverly Senske; Miriam Segall

1998-01-01

182

Korea  

E-print Network

We report an unusual complication caused by urethral catheterization. During a routine urethral catheter change in a 38-yr-old woman, a 14-Fr Foley catheter was accidentally placed into the right ureter through the ureteral orifice. The position of the catheter was confirmed by retrograde urogram through urethral catheter. Percutaneous nephrostomy was performed with subsequent proper replacement of a urethral catheter. Two weeks later, the injured ureter had healed without leakage or obstruction.

2007-01-01

183

Poster presentations  

Microsoft Academic Search

BACKGROUND: Our patient is a 15-year-old African-American female with Tetrology of Fallot, imperforate anus, anomalous ureters, mullerian anomaly and fusion of cervical spine vertebra.METHODS: Case report, review of the literature.RESULTS: DM is a 15yo African American with a history of Tetrology of Fallot, imperforate anus and anomalous ureters, all of which were repaired in infancy. She presents to the UIC

Melissa Gilliam; Lee Shulman; Antonio Scommegna

2001-01-01

184

Obstructed Bifid Uretereric System Causing Unilateral Hydronephrosis  

PubMed Central

Bifid ureters are a common malformation of the urinary system. In clinical practice, hydronephrosis resulting from obstruction of such a system is rare. The authors present a case involving an 88-year-old man admitted to the hospital with symptoms of renal failure, where bifid ureters were found incidentally in a hydronephrotic kidney during an emergency nephrostomy. This had been missed on a previous CT scan, resulting in a unique therapeutic dilemma. PMID:24223026

Bhamani, Amyn; Srivastava, Manoj

2013-01-01

185

Megaureter visualization on Tc-99m DMSA scintigraphy.  

PubMed

We present a patient with left-sided obstructed megaureter secondary to neuropathic bladder. He was referred for technetium-99m dimercaptosuccinic acid ((99m)Tc-DMSA) renal cortical scintigraphy to evaluate renal cortical function. Images obtained 4 hr after injection showed significant activity in the dilated left ureter. When the ureter is visualized on DMSA scan, obstructive megaureter should be considered in the differential diagnosis. PMID:16164201

Türkölmez, Seyda; Ors, Derya; Korkmaz, Meliha

2005-07-01

186

[Vesico-ureteral reflux. Ultrasonographic aspect of endoscopic treatment (excluding follow-up)].  

PubMed

Thirty four children, mean age 6 years, with reflux of 56 ureters were treated by an endoscopic approach. The technique, a recent innovation, attempts to reinforce the intravesical trajectory of the ureter by the injection of a Teflon disk below the vesical mucosa at the ureteral meatus level. The Teflon disk used is radiotransparent but could always be detected by ultrasound imaging, whatever its size, as a very reflecting image with a posterior cone shadow. PMID:3058954

Coche, G; Schmit, M; Aubert, D; Destuynder, O; Lemouel, A

1988-10-01

187

Laparoscopic ipsilateral ureteroureterostomy for the management of children with duplication anomalies  

PubMed Central

Aim: Ipsilateral ureteroureterostomy is an established method for the treatment of duplication anomalies in children. With the advent of pediatric laparoscopy, many urologic procedures in children are being performed using minimal access techniques. We present our experience with laparoscopic ipsilateral ureteroureterostomy (LIUU) for duplex anomalies. Patients and Methods: The data of children who underwent LIUU was reviewed for demographic parameters, clinical and operative details, follow-up and results. Results: Over 3 years period, LIUU was performed in eight children (age 6-60 months). Five children had complete ipsilateral duplication with ectopic upper moiety ureter, one child each had ipsilateral incomplete duplication and bilateral duplex systems (with ipsilateral ectopic upper moiety ureter). One child had ipsilateral complete duplex with Grade V vesicoureteric reflux into the lower moiety ureter. Four children had antenatal diagnosis of hydronephrosis; three children had a urinary infection and two children presented with urinary incontinence. The surgical procedure consisted of cystoscopy, retrograde studies and cannulation of the recipient ureter. Then, LIUU was performed using three ports. The ectopic (donor) ureter was divided at the pelvic brim; the recipient ureter was opened and end-to-side LIUU was performed with 5/0 vicryl stitches over a double J (DJ) stent placed in the recipient ureter. Bladder catheter was removed after 2 days, and DJ stent was removed after 4 weeks. At a mean follow-up of 19 months (3-36), all children are asymptomatic and continent, with a significant reduction in hydroureteronephrosis on ultrasound. The cosmetic results were excellent. Conclusion: LIUU is a safe and effective technique in the management of duplication anomalies in children. It could be performed with minimal blood loss, minimal postoperative pain, excellent cosmesis and good success. PMID:25552828

Chandrasekharam, VVS; Jayaram, Harish

2015-01-01

188

Socioeconomic evaluation of the treatment of ureteral lithiasis  

PubMed Central

Background and aim: This study attempts to estimate the socioeconomic differences between three major alternatives for the management of upper and lower ureteral lithiasis. Material and methods: Two hundred and forty patients with upper and lower ureteral lithiasis, have been studied retrospectively, divided in six equal groups of forty. These patients have been treated either by extracorporeal shockwave lithotripsy (SWL), or with ureteroscopy with semirigid ureteroscope and the use of pneumatic lithoclast, or with ureteroscopy with flexible ureteroscope and the use of Holmium YAG Laser. For cost calculation, the reimbursement fee paid by insurance to the hospital was taken into account. For the estimation of the social burden, the length of hospital stay and the number of outpatient visits have been included as countable parameters. Results: The percentage of effective stone removal for upper ureter was 81.0% for SWL, 62.5% for ureteroscopy with semirigid ureteroscope and the use of pneumatic lithoclast and, 82.5% for ureteroscopy with flexible ureteroscope and the use of Holmium YAG Laser. The same percentages for lower ureter were 82.5%, 92.5% and 97.5% respectively. The cost of stone removal for both the upper and lower ureter using extracorporeal lithotripsy was significantly higher compared to the other two procedures (median cost for upper ureter 828 € vs 474.50 € and 396 € respectively, and for lower ureter 826 € vs 396 € and 271 €, p<0.001). Regarding the social aspect, SWL is mainly an outpatient procedure, requiring a short hospital stay (for upper ureter 1.63 vs 2.48 and 2.45 respectively and for lower ureter 1.35 vs 2.43 and 2.13days), but needing more and prevailing clinic visits (for upper ureter 1.43 vs 1.45 and 1 respectively and for lower ureter 1.45 vs 1.15 and 0.55 visitsgive numbers, compare), both in outpatient and in accident and emergency (A&E) department. Conclusion: The increase in the expenses with regard to health management indicates the necessity of cost accounting the health programs including the medical procedures as a means to improve the relation between cost and benefit. PMID:22435024

Rombi, T; Triantafyllidis, A; Fotas, A; Konstantinidis, T; Touloupidis, S

2011-01-01

189

Iatrogenic ureteral lesions and repair: a review for gynecologists.  

PubMed

Ureter injuries are a well-known complication of gynecologic surgery and a frequent cause of medicolegal problems. Because there are no randomized, controlled trials and the available studies are small series and case reports, the evidence on which to base treatment is weak. We therefore reviewed the complete English-language literature of ureter repair since 1990. In total, 608 ureter injuries were reported. Although it is widely believed that for laceration or section the prognosis is affected by a delay in diagnosis, we could not find evidence to substantiate this. An obstruction requires stenting only. For a laceration, stenting with suturing was more effective than stenting only (p = .006). A ureter anastomosis was successful in over 94% of cases either by laparotomy or laparoscopy. In conclusion, the literature data are scanty and heterogeneous and do not permit solid conclusions. Evidence, however, is emerging that a laceration should be treated by stenting and suturing. A ureter anastomosis over a stent could become a valid option especially when performed by laparoscopy. PMID:17630159

De Cicco, Carlo; Ret Dávalos, Maria Lorena; Van Cleynenbreugel, Ben; Verguts, Jasper; Koninckx, Philippe Robert

2007-01-01

190

[Obstructive uropathy in nephrotuberculosis and the results of its surgical correction].  

PubMed

In 2000 to 2006, one hundred and fifty-eight patients with active nephrotuberculosis, including 24 without obstructive uropathy, 70 with obstruction at the level of the upper ureter third, and 64 with that at the level of the lower ureter third, were examined. It was shown that papillites, pyonephroses, and specific paranephritis were prevalent when a specific process extended to the upper ureter third. Involvement of the lower ureter third resulted in the most significant renal destruction that was bilateral in 75% of cases with a large proportion (51.4%) of complete organ destruction and complications of the underlying disease. The effectiveness of organ-removing operations was higher in ureteritis of the upper third of the ureter and that of reconstructive operations was higher in ureteritis of the lower third. Surgical treatment for nephrotuberculosis in distal obstruction induced no regression of renal failure in 24% of cases, its progression being observed in 8%. Every five patients were reoperated on; more than 29% of the patients underwent bilateral operations; the proportion of organ-removing interventions turn to be highest. PMID:19514459

Volkov, A A; Zuban', O N

2009-01-01

191

Urolithiasis in primary obstructive megaureter: a management dilemma.  

PubMed

Megaureter with urolithiasis is an uncommon entity. These stones may be located in the kidney, ureter or both. Management of these cases is difficult due to free mobility and stone multiplicity. As there are no guidelines about the management, the surgeon usually manages according to her/his experience, stone location or burden. The goal is to remove the stones and reimplant the ureters in the same session, if possible. We describe single-stage management of one such patient who presented with bilateral multiple ureteral and left renal stones. The left ureteral stones were first flushed into the kidney by the ureteroscope. Percutaneous nephrolithotomy was then performed and stones were removed intact. The patient was then turned supine and the location of right ureteral stones was confirmed by fluoroscopy in the same location (right lower ureter). The patient underwent successful bilateral ureteroneocystostomy with simultaneous removal of right lower ureteral stones. PMID:24879732

Kumar, Arvind; Goel, Apul; Singh, Manmeet; Sankwar, Satya Narayan

2014-01-01

192

Split ureteral stent after ureteroureterostomy.  

PubMed

Ipsilateral ureteroureterostomy is a well documented surgical approach to duplicated collecting systems associated with obstruction or Vesicoureteral reflux. Indwelling stents are employed in these procedures, to facilitate unobstructed flow across the anastomosis, to minimize anastomotic leak, and to assist in aligning the repair. Positioning of the ureteral stent is controversial. Some advocate placement of the stent to the recipient ureter across the suture line to prevent anastomotic stricture. Others prefer placing the stent along the donor ureter in order to facilitate drainage of the moiety that was originally obstructed. We describe a technique that allows drainage both ureters by using a single stent that has been split at its proximal end just across the U-U anastomosis. PMID:23523181

Hidas, Guy; McLorie, Gordon; McAleer, Irene

2013-08-01

193

Four miniature kidneys: supernumerary kidney and multiple organ system anomalies.  

PubMed

More than 350 years after Martius's first reported case in 1656, supernumerary kidney (SNK) continues to fascinate the world of medicine, generating new ideas in the domain of embryogenesis. Association of a normal kidney with a second or third ipsilateral smaller kidney is an extremely rare anomaly with only a total of 81 cases reported until today. We are reporting a case of SNK, clinically diagnosed as right hydronephrosis, associated with an ipsilateral ectopic ureter, a contralateral partially duplicated ureter, and a multiseptate gallbladder. Pathologic examination of the nephrectomy revealed 4 miniature kidneys, joining a dilated ureter through 4 separate conduits. Our patient is the first reported case of SNK with absent ipsilateral normal kidney, presence of more than 3 kidneys on 1 side, and associated anomaly in the gallbladder. This case represents a unique combination of rarities, suggesting insights in the domain of molecular embryology. PMID:24593866

Afrouzian, Marjan; Sonstein, Joseph; Dadfarnia, Tahereh; Sreshta, J Nicholas; Hawkins, Hal K

2014-05-01

194

[Treatment of vesico-renal reflux in children with endoscopic injection of polytetrafluoroethylene (teflon). Apropos of a series of 100 cases of reflux in 72 children].  

PubMed

The endoscopic subureteral injection of teflon is a new alternative to correct vesicorenal reflux in children. We report the use of this procedure in 72 children presenting with 100 refluxing ureters. In 98 refluxing units the disappearance of reflux was noted on a cystogram performed immediately (success rate: 98%). Followup after 6 months, the reflux recurred in 6 ureters of 52 controlled units (success rate 88.5%). Obstruction was not observed in any cases by repeated ultrasonography. The procedure is simple and reliable. In a failure that required an open operation, surgical reimplantation was not difficult. An endoscopic technique to cure reflux, of various grades would be a valuable alternative. The procedure certainly has advantages for difficult surgical reimplantations (neurogenic bladder, failed reimplant ureters). However, many years follow up are needed to demonstrate lasting success and absence of complications. PMID:2624439

Aubert, D; Destuynder, O; Zoupanos, G

1989-01-01

195

Mesenteric Fibromatosis Causing Ureteral Stenosis  

PubMed Central

Mesenteric fibromatosis is a rare benign disease characterized by proliferating fibrous tissue in the bowel mesentery. We report a case of aggressive mesenteric fibromatosis with ureteral stenosis arising in a 46-year-old woman who suffered from intermittent right abdominal pain. Computed tomography revealed a right retroperitoneal mass with right ureteral stenosis at the level of the right common iliac vessel. The mass was excised with resection of the affected segment of the ileum, ascending colon, and ureter, and end-to-end ureter anastomosis was performed. Pathological examination confirmed mesenteric fibromatosis. PMID:20664786

Choi, Jae Young; Kang, Kyung Mo; Kim, Bum Soo

2010-01-01

196

Ureteral quintuplication with renal atrophy in an infant after the 1986 Chernobyl nuclear disaster.  

PubMed

Ureteral duplication is a comparatively frequent urinary tract anomaly. Ureteral triplication is rare, but quadruplication is extremely rare. In this study, we describe a case of ureteral quintuplication, the first such report in the English-language literature. A newborn female baby was diagnosed with left ureteral quintuplication. The left ureter was divided into 5 ureters with 5 renal pelvises within approximately 3 cm of the urinary bladder, and trace parenchyma of the kidney was noted. The patient was born within 60 km of the epicenter of the 1986 Chernobyl disaster, 24 years after the catastrophic nuclear accident, and is currently aged 3 years. PMID:24001707

Jurkiewicz, Beata; Z?bkowski, Tomasz; Shevchuk, Dmitrij

2014-01-01

197

Urolithiasis in an Adult with Primary Obstructive Megaureter: A Case Report  

PubMed Central

This is a rare case of adult primary obstructive megaureter complicated by combined uric acid-oxalate lithiasis of the ureter and renal stones. A 24-year-old male patient presented with frank hematuria on exercise of 4 years duration. The patient had an open surgery in the form of excision of stenotic segment of ureter and left ureteric re-implantation with removal of ureteric and renal stones. Congenital megaureter is a diagnosis that urologists and radiologists need to consider in the setting of isolated distal ureteral dilation, as the diagnosis of adult megaureter may require more involved surgical measures to prevent recurrence of adverse symptoms. PMID:24044065

Al-Marhoon, Mohammed S.; Venkiteswaran, Khrishna P.; Shareef, Omar W.

2013-01-01

198

Contralateral Renal Cell Carcinoma Ureteric Metastases Can Arise on Tyrosine Kinase Adjuvant Therapy and Be Effectively Treated by Endoscopic Laser Excision and Ablation  

PubMed Central

Renal cell carcinoma (RCC) uncommonly metastasizes to the ureter and rarely to the contralateral ureter. We describe the presentation of 2 successive contralateral ureteric metastases from RCC in our institution. The first represents the only reported metachronous ureteric deposit on adjuvant sorafenib after laparoscopic radical nephrectomy for RCC. The other presented with a synchronous lesion after radiological work-up. Both lesions were treated with endoscopic excision and laser ablation with preservation of the renal unit and no local recurrence. We report these cases and discuss the literature. PMID:25105052

Reid, Sarah L.; Arestis, Nikolas J.; Lamb, Gavin W. A.

2014-01-01

199

[Laparoscopic pyeloplasty in a complicated duplicated collecting system].  

PubMed

Laparoscopic pyeloplasty has been established as an effective and minimally invasive technique for treating ureteropelvic junction obstruction. Only case reports are available describing the use of laparoscopic pyeloplasty in patients with duplicated collecting systems. We report the case of a patient presenting with a short stenotic connection between the hydronephrotic lower pole system and a solitary ureter coming from the upper pole. In this patient, a side-to-side anastomosis between the renal pelvis and the ureter was successfully performed. The present data demonstrate that laparoscopic pyeloplasty is an applicable tool even in patients with upper urinary tract anomalies such as duplicated collecting systems. PMID:18379750

Corvin, S; Ulbrich, D M; Laible, V; Nagele, U; Stenzl, A

2008-07-01

200

[The stimulation of ureteral motor activity by ultrasound in ureterolithiasis].  

PubMed

The paper presents methodological and therapeutic aspects of the experiment in which rabbit ureters were stimulated with ultrasound. Rectal exposure to the ultrasound made impulses from the ureteral smooth muscle significantly more frequent in 100% of the animals, applications of the ultrasound to the skin produced the same results in 70% of the test animals. The authors also achieved clinical effects in 63.6% and 86.7% of patients with ureteroliths or their fragments, respectively, in the low third of the ureter following combined treatment which involved oral mineral water, sodium chloride baths and ultrasound. The effect was evident after a single treatment course. PMID:8266670

Li, A A; Malikova, S N; Nesterov, N I; Glukhov, A I

1993-01-01

201

Veliparib, Cisplatin, and Gemcitabine Hydrochloride in Treating Patients With Advanced Biliary, Pancreatic, Urothelial, or Non-Small Cell Lung Cancer  

ClinicalTrials.gov

Advanced Adult Primary Liver Cancer; Localized Unresectable Adult Primary Liver Cancer; Metastatic Transitional Cell Cancer of the Renal Pelvis and Ureter; Regional Transitional Cell Cancer of the Renal Pelvis and Ureter; Stage III Bladder Cancer; Stage III Pancreatic Cancer; Stage IIIA Non-small Cell Lung Cancer; Stage IIIB Non-small Cell Lung Cancer; Stage IV Bladder Cancer; Stage IV Non-small Cell Lung Cancer; Stage IV Pancreatic Cancer; Transitional Cell Carcinoma of the Bladder; Unresectable Extrahepatic Bile Duct Cancer; Unresectable Gallbladder Cancer

2013-07-01

202

Spontaneous Forniceal Rupture in Pregnancy  

PubMed Central

Forniceal rupture is a rare event in pregnancy. We report a case of a 26-year-old primigravid woman who experienced a forniceal rupture at 23 weeks of gestation with no inciting cause except for pregnancy. Pregnancy is associated with ureteral compression due to increase in pelvic vasculature with the right ureter more dilated due to anatomic reasons. Hormones such as prostaglandins and progesterone render the ureter more distensible to allow for pressure build-up and an obstructive picture at the collecting system. We will discuss physiologic changes in pregnancies that predispose to this uncommon phenomenon and the most up-to-date management strategies. PMID:25648411

Upputalla, Roshni; Moore, Robert M.; Jim, Belinda

2015-01-01

203

Technetium99m-DMSA Renal Cortical Scintigraphy to Detect Experimental Acute Pyelonephritis in Piglets: Comparison of Planar (Pinhole) and SPECT Imaging  

Microsoft Academic Search

The purpose of this study was to directly compare the sensitivity and specificity of SPECT and pinhole imaging for the detection of acute pyelonephritis using histology as the standard of reference. Methods: Bilateralvesicoureteralreflux of infected urine was in duced in 16 piglets (32 kidneys) by unroofing the intravesical ureter and subsequently instilling a broth culture of £coli into the bladder.

Massoud Majd; H. Gil Rushton; Roma Chandra; Mary P. Andrich; Chris P. Tardif; Fariborz Rashti

204

Mitogen-activated protein kinases mediate changes in gene expression, but not cytoskeletal organization associated with cardiac muscle cell hypertrophy  

Microsoft Academic Search

Shortly after birth, cardiac myocytes lose the ability to divide, and, in adult animals, heart mus- cle grows by a process of cellular hypertrophy where each individual cell gets larger. We have previously shown that activated Ras protein can induce markers of the hypertrophic phenotype, including atrial natri- uretic factor (ANF) expression and organization of contractile proteins, and that Ras

Jacqueline Thorburn; Jeffrey A. Frost; Andrew Thorburn

1994-01-01

205

EUS Annual Meeting, April 25, 2009, Chicago, IL Page 28 of 102 ABSTRACT 13 OUTSTANDING PAPER AWARD  

E-print Network

for diagnosing and treating stones, scar tissue and tumors in the ureter and collecting system of the kidney the size and location of stones, and scope selection and manipulation) are based on imaging data taken allow stone placement), and rectangular alignment tabs were added. The model was then sliced into layers

Janardan, Ravi

206

Modeling and Simulation for Flexible Ureteroscopy  

E-print Network

Background: A flexible ureteroscope is a small-caliber endoscope for treating stones, scar tissue, and tumors in the ureter and collecting system of the kidney. Presently, surgical planning decisions (e.g., understanding patient-specific calyceal anatomy, identifying stone size and location, and scope selection

Janardan, Ravi

207

Robotization of a ureteroscope for efficient semi-automatic vaporization of kidney stones  

E-print Network

Robotization of a ureteroscope for efficient semi-automatic vaporization of kidney stones Benoit Rosa, Pierre Mozer, and J´er^ome Szewczyk Email : firstname.name@isir.upmc.fr I. INTRODUCTION Kidney pass the ureter and therefore must be treated inside the kidney. The operation process is the following

Paris-Sud XI, Université de

208

Mathematical Medicine and Biology Page 1 of 24 doi:10.1093/imammb/dqn020  

E-print Network

of pressure (e.g. tumours) and internal blockages (e.g. kidney stones). The high urine pressures generated can pelvis from the kidney with a prescribed flux. The stent, ureter and renal pelvis are filled with urine. If the obstruction cannot be removed, then the pressure must be relieved, either by a nephrostomy (drainage directly

Waters, Sarah

209

A Prototype Ultrasound Instrument To Size Stone Fragments During Ureteroscopy  

Microsoft Academic Search

An intraoperative tool to measure the size of kidney stones or stone fragments during ureteroscopy would help urologists assess if a fragment is small enough to be removed through the ureter or ureteral access sheath. The goal of this study was to determine the accuracy and precision of a prototype ultrasound device used to measure in vitro stone fragments compared

Mathew D. Sorensen; Joel M. H. Teichman; Michael R. Bailey

2008-01-01

210

ESWL in situ or ureteroscopy for ureteric stones?  

Microsoft Academic Search

As documented by follow-up data on ureteric stones in 1259 ureteric units treated, ESWL in situ on advanced lithotriptors with stone location by ultrasonography and fluoroscopy was successful without any retrograde ureteric manipulation in 98% of stones in the upper, 71% in the iliac, and 84% in the distal ureter; 85% of the units were stone-free within 3 months: ancillary

J. Hofbauer; C. Tuerk; K. Höbarth; R. Hasun; M. Marberger

1993-01-01

211

Combined laparoscopic and vaginal approach for nephrectomy, ureterectomy, and removal of a large rectovaginal endometriotic nodule causing loss of renal function  

Microsoft Academic Search

A late consequence of ureteral endometriosis is the silent loss of renal function caused by progressive “enclosure” of the lower part of the ureter by the endometriosis. In our experience, in cases of severe loss of renal function with cortical atrophy and residual kidney function (evaluated by Tc99 DMSA scintigraphy) of less than 15%, removal of the endometriosis combined with

Pascale Jadoul; Axel Feyaerts; Jean Squifflet; Jacques Donnez

2007-01-01

212

The advantages of bilateral simultaneous stone removal from the upper urinary tract  

Microsoft Academic Search

An anterior transperitoneal approach was used to remove the stones from both kidneys and\\/or ureters simultaneously in 18 patients. The morbidity of this type of surgery in our study was very low and there were no surgical difficulties in exposing the intrarenal structures. Furthermore, especially in secondary cases, this approach was easier and more time-saving than the classical flank approach.

D. Remzi; H. Özen; S. Özgür

1984-01-01

213

Stone Burden in an Average Swedish Population of Stone Formers Requiring Active Stone Removal: How Can the Stone Size Be Estimated in the Clinical Routine?  

Microsoft Academic Search

Objective: To get information on the distribution of stone burdens in an average and representative group of Swedish stone forming patients requiring active removal of stones from the kidneys or ureters and to compare different methods for assessing the stone burden.Methods: A computerised device was used to measure the total stone surface area (Ameasured) of 599 stone situations in kidneys

Hans-Göran Tiselius; Annika Andersson

2003-01-01

214

Low Catalase Activity in Rats with Ureteral Ligation: Relation to Lipid Peroxidation  

Microsoft Academic Search

Progression of some renal diseases is characterized by generation of reactive oxygen metabolites that are also involved in the pathophysiology of obstructive nephropathy. Catalase activity and lipid peroxidation were investigated in rats with unilaterally (UUL) and bilaterally ligated ureters (BUL). Forty-eight hours after ligation, the animals were sacrificed, and enzyme activity as well as the malondialdehyde (MDA) concentration were measured

1998-01-01

215

Subject-based Semantic Document Clustering for Digital Forensic Investigations  

E-print Network

Subject-based Semantic Document Clustering for Digital Forensic Investigations Gaby G. Dagher computers has created a demand for special forensic tools that allow investigators to look for evidence by the forensic process at S^uret´e du Qu´ebec (SQ), the Qu´ebec provincial police, we propose a new subject

Fung, Benjamin C. M.

216

What I need to know about My Child's Urinary Tract  

E-print Network

Services NATIONAL INSTITUTES OF HEALTH National Kidney and Urologic Diseases Information Clearinghouse #12 Services NATIONAL INSTITUTES OF HEALTH National Kidney and Urologic Diseases Information Clearinghouse #12 includes two kidneys, two ureters, a bladder, and a urethra. The kidneys are a pair of bean- shaped organs

Baker, Chris I.

217

Kidney stone treatment http://www.sciencephoto.com/media/282652/view[19/06/2012 14:38:20  

E-print Network

Kidney stone treatment http://www.sciencephoto.com/media/282652/view[19/06/2012 14:38:20] Kidney/SCIENCE PHOTO LIBRARY Caption: Kidney stone treatment. Medical researcher testing a method for monitoring kidney stone treatment. Kidney stones are deposits of calcium and other minerals in the kidneys and ureters

Sóbester, András

218

GASTROINTESTINAL ANATOMY Fig. 171. Longitudinal section through the liver  

E-print Network

. The urinary bladder, seen just above the rectum, enters the cloaca ventrally. The dorsally-located kidneys medial to the kidney. The testis of this immature male is still attached to the peritoneum (and is located anatomically ventral to the kidneys). urinary bladder rectumkidney renal veins cloaca ureter colon

219

Kidney Dysplasia National Kidney and Urologic Diseases Information Clearinghouse  

E-print Network

Kidney Dysplasia National Kidney and Urologic Diseases Information Clearinghouse U.S. Department of Health and Human Services NATIONAL INSTITUTES OF HEALTH What is kidney dysplasia? The kidneys are a pair the kidneys to the bladder through tubes called ureters. Kidney dysplasia is a condition that can occur

Baker, Chris I.

220

Identification of Immunohistochemical Factors That Predict the Synchronous or Metachronous Development of Bladder Tumors in Patients with Upper Urinary Tract Tumors  

Microsoft Academic Search

Objective: To identify markers that predict the synchronous or metachronous development of bladder cancer in patients with upper urinary tract (UUT) tumors. Materials and Methods: Between March 2001 and December 2005, we identified 38 consecutive patients who had been histologically diagnosed as having transitional cell carcinoma in the renal pelvis and ureter. These patients were divided into 2 groups (n

Jae Young Joung; Seung Ok Yang; In Gab Jeong; Kyung Seok Han; Ho Kyung Seo; Jinsoo Chung; Weon Seo Park; Geon Kook Lee; Kang Hyun Lee

2008-01-01

221

Urinary diversion via a continent ileal reservoir: Clinical results in 12 patients  

Microsoft Academic Search

Urinary diversion via a continent ileal reservoir has been performed in 12 patients. An isolated ileal reservoir was constructed using the technique described for patients with a continent ileostomy. The ureters were implanted into an afferent segment provided with a reflux-preventing nipple valve. There were few operative complications and no operative mortality. Late complications involving malfunction of the nipple valves

N. G. Kock; A. E. Nilson; L. O. Nilsson; L. J. Norlén; B. M. Philipson

2002-01-01

222

Vesicoureteral Reflux and Reflux Nephropathy  

Microsoft Academic Search

Vesicoureteral reflux is an anatomic abnormality, mostly affecting a pediatric population, which may be the second leading cause of end-stage renal failure. Most cases of reflux are due to abnormalities in the insertion of the ureters into the bladder, either congenital or acquired. Most commonly, VUR is discovered during routine evaluation of urinary tract infections, but may also be present

Harry O. Senekjian; Wadi N. Suki

1982-01-01

223

Ureterocele Associated with Renal Agenesia Presented as a Pelvic Mass in an Adult  

PubMed Central

Adult ureteroceles are generally known as simple ureteroceles with minimal obstructive effects 1 that can usually be managed endoscopically. Such pathology presented with acute abdominal pain and fever in a 32-year-old man with left renal agenesia, a cranial blind left ureter and left obstructed ureterocele. The retained secretions were suppurative. PMID:23599714

Mohseni, Mohammad Ghasem; Hosseini, Seyed Reza; Salavati, Alborz; Dadgari, Shahrzad

2012-01-01

224

Incontinence in a Child with a Duplex Kidney: Case Report  

PubMed Central

Persistent incontinence after toilet training in young girls and urinary tract infections or epididymitis in prepubertal boys should raise suspicion of an ectopic ureter. This often occurs in the context of duplication of kidney structures or other parenchymal abnormalities. The presence or absence of reflux affects surgical treatment, which may consist of ureteral reimplantation, ureteroureterostomy, and/or upper pole nephrectomy. PMID:16985653

Handler, Toby F; Shapiro, Ellen

2002-01-01

225

[Ureterocystoplasty in the treatment of "low-compliance" bladder in children].  

PubMed

In cases of inadequate or insufficient conservative treatment of non-compliant bladders the function of the upper urinary tract is jeopardized. We present our experience with ureterocystoplasty as one possible treatment option.A total of eight children underwent ureterocystoplasty. The etiology of bladder non-compliance and the need for augmentation was neurogenic in five children, posterior urethral valves in two children, and in one child after repeated antireflux surgery. In all patients the kidney of the used ureter was functionless. Surgery was done through a transperitoneal approach. Following nephrectomy, the renal pelvis and the ureter were spatulated and sutured into the bladder incision. An additional MACE procedure was performed in three patients, antireflux surgery for the contralateral kidney in two patients, and one patient underwent stone removal in the remaining kidney. In one patient the ureter was used as a free transplant and was covered by an omental flap. In addition a simultaneous living donor kidney transplant was performed. The storage function could be improved in all patients. The function of the ureter which was used as a free transplant showed good clinical results. The longest follow-up is 8 years. Ureterocystoplasty is a useful and metabolically neutral alternative to bowel segments. In patients with only one functioning kidney and a contralateral megaureter, ureterocystoplasty is the treatment of choice in our institution. PMID:18071774

Hauser, S; Fisang, C; Fechner, F; Ellinger, J; Haferkamp, A; Müller, S C

2007-12-01

226

Long-term results after megaureter folding in children  

Microsoft Academic Search

In 56 megaureters treated by the folding technique, good results were obtained in 52 (93%). Complications in four ureters included stenosis (2) and vesico-ureteral reflux (2). The width of the megaureters and minor renal calyces, the degree of hydronephrosis, and the serum urea and creatinine levels decreased significantly after the operation. The renal parenchyma thickness and the creatinine clearance level

Wojciech Perdzynski; Zygmunt H Kalici?ski

1996-01-01

227

A MODIFIED TECHNIQUE OF URETEROPLASTY FOR MEGAURETER IN CHILDREN  

Microsoft Academic Search

PurposeExcisional ureteroplasty carries the risks of jeopardizing the ureteral vasculature and leakage from the suture. The folding techniques are theoretically less prone to these risks, although they have other disadvantages due to the bulky ureter. According to the literature, these 2 approaches have similar complication rates of 4% to 25%, to include stenosis, reflux and leakage. We introduce a modified

FRANCISCO OSSANDON; MARIA VICTORIA ROMANINI; MICHELE TORRE

2005-01-01

228

Ureterocystoplasty: a novel approach to augment small capacity urinary bladder in adults.  

PubMed

Ureterocystoplasty is a novel operation well suited for patients having small capacity urinary bladder with unilateral poorly functioning kidney and megaureter. The megaureter is detubularized and used for urinary bladder augmentation. The ureter lining has advantage of being non-secretory and free from the metabolic complications of enterocystoplasty. This operation is mainly done in children. This is one of the very few from the Asian subcontinent which describes the short term results of ureterocystoplasty in an adult patient. We report a case wherein ureterocystoplasty was performed in an 18-year male presented with a small capacity neurogenic bladder with a grossly dilated and tortuous left ureter and a non-functioning left kidney. Left ureter was detubularized and used for augmentation after left nephrectomy. Blood supply to the left ureter was preserved during the dissection. After the operation, the bladder capacity increased adequately and he is doing well at a followup of 1 year. Ureterocystoplasty works well in the adult patients also and the bladder capacity increases adequately following this procedure. PMID:23133139

Singh, Vishwajeet; Sinha, Rahul Janak; Sankhwar, S N

2009-06-01

229

Operative treatment of megaureter in adults  

Microsoft Academic Search

After a general outline of ideas about surgery of the megaureter, the author presents one-year postoperative results for 3 adult patients with megaureter, operated on by Prof. Hardy Hendren during his visit to Warsaw. The tapering of the ureters and reimplantation were done in all 3 cases. Though the presented material is too small to draw a definite conclusion, the

A. Borkowski

1977-01-01

230

Case Report-Inguinoscrotal ureteral hernia diagnosed on micturating cystourethrography  

PubMed Central

The presence of a ureter within an inguinal hernia is an extremely rare entity, usually discovered incidentally during herniorrhaphy and may pose a surgical risk. Early preoperative diagnosis is crucial to guide proper surgical approach and to preserve renal function. PMID:22013295

Sripathi, Smiti; Rajagopal, KV; Kakkar, Chandan; Polnaya, Ashwin

2011-01-01

231

Kidney Stone ProgramKIDNEY STONE PROGRAM STEPHEN DRETLER, MD  

E-print Network

in the lower pole Sources: American Foundation of Urologic Disease; Urology Times; Journal of Urology Generic/ureter Steps for Patient Treatment After Radiologic and Laboratory Studies · Urology consult and admission and Laboratory Studies · Urology consult and admission · Pain medication · Monitoring Possible Interventions

Mootha, Vamsi K.

232

Continuous dual-wavelength, high-intensive Nd:YAG laser in operative urology  

NASA Astrophysics Data System (ADS)

A ruby laser with a 0.694 mkm wavelength was used as a source of a new model of laser lithotriptor. The optical irradiation parameters selected included 1 mks duration pulse, frequency from 1 to 5 Hz, energy at an output of up to 120 mJ, transmitted via light guide quartz fiber of 400 kmk. The tip of the light guide was directed to the calculus through a catheterized cystoscope. Light guide position control was done by the presence of a specific acoustic signal accompanying plasma formation. Plasma is not formed by laser action on the ureter wall. In doubtful cases we used roentgenological examination. After lithotripsy and direct processing by irradiation, histological investigations of the ureter wall showed only slight submucosal hemorrhage or revealed no changes. Implantation of the calculus and fiber particles into the ureter wall was not observed. Twenty-nine patients were subjected to lithotripsy of calculus (oxalates, urates, phosphates) in the low and mid-ureter. Usually from 1000 to 3000 impulses were used to destroy the calculus. Calculus fragments passed without assistance (13 patients) or were removed by extractors (7 patients). The recovery of passing of urine and removal of renal colic were observed during lithotripsy if obturation had occurred (8 patients). Ureteral perforation, blood loss, and acute pyelonephritis did not occur.

Reznikov, Leonid L.; Pupkova, Ludmila S.; Miroshnicov, B. I.; Snezhko, D. A.; Nikitichev, A. A.; Pokrovskiy, Vasiliy P.; Gomberg, Vladimir G.

1994-05-01

233

Congenital ureteral valves: Two new cases and a review of the literature  

Microsoft Academic Search

Ureteral valves are a rare clinical finding. Frequently they are associated with other urological anomalies such as complete or incomplete renal duplication, ectopic ureter, vesicoureteral reflux and horseshoe kidney. Hydronephrosis is the most common clinical sign. We report two cases of ureteral valves recently encountered at the Surgical Department of Sant Joan de Dèu Hospital in Barcelona, and discuss the

Enrica Rossi; Joan Rodò Salas; Freud Cacères Aucatoma; Marta Olivares Muñoz; Luis Morales Fochs

2007-01-01

234

Report of laparoscopic ureteropyelostomy for symptomatic “yo-yo” reflux in an adult  

Microsoft Academic Search

Symptomatic presentation of partial duplication of the ureter in adults is rare. However, there are reports of such conditions being treated with surgical correction with varying degrees of success. We present the case of a 23-year-old woman who underwent what is, to our knowledge, the first reported laparoscopic ureteropyelostomy for symptomatic “yo-yo” reflux.

B. Khoubehi; C. R. Woodhouse; E. Rowe; G. Boustead; D. Hrouda

2006-01-01

235

Ultrasound diagnosis of ectopic ureterocele  

Microsoft Academic Search

Three children with ectopic ureteroceles were examined with ultrasound, intravenous urography and cystography. In all cases the ultrasound studies outlined the ectopic ureterocele within the fluid-filled bladder and in one case added additional information regarding the non-functional portion of the duplication and its ureter.

Judith S. Rose; Joseph McCarthy; Hsu-Chong Yeh

1979-01-01

236

[Laparoscopic robot-assisted partial nephrectomy with total ureterectomy in a symptomatic complete duplicated system: advantages of transperitoneal approach].  

PubMed

We report the case of a laparoscopic robot assisted left upper polar partial nephrectomy with total ureterectomy performed in a teenager. A 14 year-old girl was referred to our institution for stress urinary incontinence. The morphological assessment (ultrasound scan and uro-MRI) showed a double collecting system with a complete ureteral duplication complicated by a dysplasia of the upper moiety of the duplex left kidney and a mega ureter. The surgery started on a lateral decubitus position by the upper polar partial nephrectomy and the ureter section behind superior polar renal vessels. The patient was placed in a supine position and the mega ureter was released and sectioned at the level of the distal adynamic segment in the left uterine parameter. The transperitoneal route was chosen as it provides a large workspace and allows the dissection of the ureters into their pelvic portion by a simple repositioning of the robot ports without additional incision and without any modification of the operative field. No intraoperative and postoperative complication was noticed. Laparoscopic robotic assisted surgery in pediatric urology is increasing, and to our knowledge, we reported this technique and surgery for the first time in France and in children. In the reported case, we showed that the robotic minimally invasive surgery in children is an innovative and safe technique for the treatment of symptomatic upper urinary tract malformations. PMID:25176144

Tostivint, V; Doumerc, N; Roumiguie, M; Beauval, J-B; Rischmann, P; Soulie, M; Galinier, P; Bouali, O

2014-10-01

237

An exceptional combined malformation: duplication of the urinary and intestinal tracts and the vulva (04-80CR)  

Microsoft Academic Search

The authors reported the surgical treatment of a 2-year-old girl with complete duplication of the kidney, ureter, bladder, urethra, and the vulva, associated with intestinal duplication and complete duplication of the appendix and colon. Congenital intestinal malrotation also concurred. After a series of preoperative examinations, exploratory operation including reduction of intestinal malrotation, fusion of bladder and colon, obliteration of the

Li Jianhong; Jiang Xuewu; Hu Xianliang

2005-01-01

238

Renal excretory sectors  

Microsoft Academic Search

One thousand and ninety-four normal human kidneys and 18 abnormal (with duplication of the ureter) were studied by the corrosion method and pyelography followed by topometric and mathematics analyses. It was found that the renal pelvis is a calicopelvic complex built up of renal calices, urine ducts and renal pelvis. Before opening into the renal pelvis, renal calices join together

M. Burykh

2002-01-01

239

Bilateral pelvicalyceal duplication with contralateral drainage.  

PubMed

We report on a peculiar congenital duplication anomaly of the kidney and collecting system. A bifid left renal pelvis receives the ureter draining the lower moiety of a fully duplicated right system. To our knowledge, such an anomaly has not been previously described. PMID:19969330

Ghoneim, Islam A; Fergany, Amr F

2010-10-01

240

Extracorporeal Shock Wave Lithotripsy in Ureteral and Kidney Malformations  

Microsoft Academic Search

Introduction: Extracorporeal shock wave lithotripsy (SWL) has long been accepted worldwide in the treatment of kidney stone disease. Upper ureter calculi in ureteral and kidney malformations are rather frequent (10–25%). The aims of this retrospective study were to determine whether malformations might impair fragment expulsion. Material and Methods: From 1986 to 1995, 203 patients with ureteral and kidney malformations were

Michele Gallucci; Andrea Vincenzoni; Manlio Schettini; Pasquale Fortunato; Antonella Cassanelli; Antonio Zaccara

2001-01-01

241

Long-Term Outcome of the Retained Ureteral Stump after Lower Pole Heminephrectomy in Duplex Kidneys  

Microsoft Academic Search

Objectives: Duplication of the ureter and renal pelvis is the most common upper urinary tract anomaly in childhood. The anatomical and functional divisions between upper and lower moieties of duplex kidney are extremely variable. The underlying pathological condition associated with a lower moiety is usually massive vesicoureteral reflux (VUR) to the lower collecting system and only rare obstruction. The non-functioning

De Caluwé; B Chertin; P Puri

2002-01-01

242

Congenital megalourethra  

Microsoft Academic Search

The authors report on two patients who had fusiform megalourethra with unusual features. The first patient had left hydronephrosis with duplication of the ureter, oblique sagittal septum in the urinary bladder, and Y duplication of urethra with megalourethra of both channels. The second had features of the abdominal muscle deficiency syndrome, with anterior ectopic anus, rectourethral fistula, and fusiform megalourethra.

A. K Wakhlu; Ashish Wakhlu; R. K Tandon; S. N Kureel

1996-01-01

243

TRATAMIENTO DE LAS DUPLICIDADES PIELOURETERALES ASOCIADAS A URETEROCELE O A URÉTER ECTÓPICO  

Microsoft Academic Search

Introduction: Pyeloureteral duplication is often associated to ureterocele and ectopic ureter. Therapeutic appro- ach of ureterocele is actually a debated subject because of the differents treatments. There is controversy about the clasic heminefrectomy with ureterocele aspiration and the minimal invasive endoscopic approach. Material and methods: We made a retrospective study about 34 children with pyeloureteral duplication asso- ciated with ureterocele

I. SOMOZA ARGIBAY; R. MÉNDEZ GALLART; M. GÓMEZ TELLADO; E. PAIS PIÑEIRO; J. LIRAS MUÑOZ; E. VÁZQUEZ MARTULL; D. VELA NIETO

244

Subtle renal duplication as an unrecognized cause of childhood incontinence: Diagnosis by magnetic resonance urography  

Microsoft Academic Search

Urinary incontinence in young girls who have been toilet trained may be due to an ectopic ureter inserting below the urinary sphincter. This diagnosis is frequently delayed, is psychologically distressing, and may be missed at physical examination. Findings at ultrasound evaluation may be subtle and imaging with computed tomography or intravenous urography exposes young patients to ionizing radiation. We report

Jafi A. Lipson; Fergus V. Coakley; Laurence S. Baskin; Benjamin M. Yeh

2008-01-01

245

Collateral bladder duplication with exstrophy of one moiety in a female infant  

Microsoft Academic Search

Complete bladder duplication with exstrophy of one moiety is an extremely rare condition. We report an unusual case of complete bladder duplication with exstrophy of one moiety, in which each bladder received one ureter and the internal bladder drained into a urogenital sinus. The patient was treated by combining the two bladder halves and using the bladder neck of the

Cem Akbal; Rosalia Misseri; Richard C. Rink; Martin Kaefer

2005-01-01

246

Nephric duct insertion is a crucial step in urinary tract maturation that is regulated by a Gata3-Raldh2-Ret molecular network in mice  

PubMed Central

Urinary tract development depends on a complex series of events in which the ureter moves from its initial branch point on the nephric duct (ND) to its final insertion site in the cloaca (the primitive bladder and urethra). Defects in this maturation process can result in malpositioned ureters and hydronephrosis, a common cause of renal disease in children. Here, we report that insertion of the ND into the cloaca is an unrecognized but crucial step that is required for proper positioning of the ureter and that depends on Ret signaling. Analysis of Ret mutant mice at birth reveals hydronephrosis and defective ureter maturation, abnormalities that our results suggest are caused, at least in part, by delayed insertion of the ND. We find a similar set of malformations in mutants lacking either Gata3 or Raldh2. We show that these factors act in parallel to regulate ND insertion via Ret. Morphological analysis of ND extension in wild-type embryos reveals elaborate cellular protrusions at ND tips that are not detected in Ret, Gata3 or Raldh2 mutant embryos, suggesting that these protrusions may normally be important for fusion with the cloaca. Together, our studies reveal a novel Ret-dependent event, ND insertion, that, when abnormal, can cause obstruction and hydronephrosis at birth; whether ND defects underlie similar types of urinary tract abnormalities in humans is an interesting possibility. PMID:21521737

Chia, Ian; Grote, David; Marcotte, Michael; Batourina, Ekaterina; Mendelsohn, Cathy; Bouchard, Maxime

2011-01-01

247

Minimal Surgery with Renal Preservation in Anomalous Complete Duplicated Systems: Is it Feasible?  

Microsoft Academic Search

From 1985 to 1993, 33 female and 4 male patients 0 to 3 years old presented with abnormal complete duplex systems of whom 25 had a prenatal diagnosis of hydronephrosis. Diagnosis in 40 ureteral moieties included ureteroceles in 10, ectopic ureteral insertions with reflux and obstruction in 17, and refluxing lower ureters in 13. Of 40 renal units only 6

Umesh Patil; Ranjiv Mathews

1995-01-01

248

Medical versus Surgical Management of Vesico Ureteral Reflux  

Microsoft Academic Search

Vesico ureteral reflux is the abnormal retrograde flow of urine from the bladder into the ureter and possibly the kidney. There are 2 types of reflux: Primary reflux - which is caused by a congenital abnormality at the ureterovesical junction Secondary reflux - occurs when high pressure in the bladder causes a breakdown of the nor- mal antireflux mechanism at

Vivek M Rege

249

Obstructive ureterocele—an ongoing challenge  

Microsoft Academic Search

Ureterocele is a cystic dilatation of the intravesical ureter that is most commonly observed in females and children, and usually affects the upper moiety of a complete pyeloureteral duplication. According to their position, ureteroceles are divided into intravesical, when the ureterocele is completely contained inside the bladder, and extravesical when part of the cyst extends to the urethra or bladder

E. Merlini; P. Lelli Chiesa

2004-01-01

250

Triplicidad ureteral: Una inusual presentación aislada  

Microsoft Academic Search

URETERAL TRIPLICATION, AN UNUSUAL ISOLATED PRESENTATION We report the case of a 26 years old female who presented, as a casual finding, a right complete ureteral triplicity ( probably Campbell's tipe I) with no other associated abnormalities. Despite ureteral duplication is a frequent urological anomaly, the presence of three ureters occur- ring in the same side, in a complete or

A. Villanueva Peña; E. de Diego Rodríguez

2004-01-01

251

Percutaneous nephrostomy and antegrade ureteral stenting: technique—indications—complications  

Microsoft Academic Search

In this review the technique, indication for and complications of percutaneous nephrostomy (PCN) and antegrade ureter stent insertion are described. In the majority of the cases PCN is performed to relieve urinary obstruction, which can be of benign or malignant nature. Another indication for PCN is for treatment of urinary fistulas. PCN can be performed under ultrasound and\\/or fluoroscopic guidance,

Klaus Armin Hausegger; Horst Rupert Portugaller

2006-01-01

252

Malignant paraganglioma in a cougar (Puma concolor).  

PubMed

A 7½-yr-old male cougar (Puma concolor) was presented with a 2-wk history of progressive hindlimb abnormalities. An abdominal mass was palpated on physical examination. Computed tomography of the abdomen showed a mass surrounding the left ureter. A postmortem diagnosis of paraganglioma was established. PMID:25632701

Duhamelle, Alexis; Langlois, Isabelle; Pey, Pascaline; Tremblay, Josée; Ruel, Hélène; Parent, Joane; Lussier, Joanie; Doré, Monique

2014-12-01

253

Late effects of intraoperative radiation therapy on retroperitoneal tissues, intestine, and bile duct in a large animal model  

Microsoft Academic Search

The late histopathological effects of intraoperative radiotherapy (IORT) on retroperitoneal tissues, intestine, and bile duct were investigated in dogs. Fourteen adult foxhounds were subjected to laparotomy and varying doses (0-45 Gy) of IORT (11 MeV electrons) delivered to retroperitoneal tissues including the great vessels and ureters, to a loop of defunctionalized small bowel, or to the extrahepatic bile duct. One

William F. Sindelar; Joel E. Tepper; T. J. Kinslla; Margaret Barnes; Anne Marie DeLuca; Richard Terrill; Donna Matthews; P. A. S. Johnstone; W. J. Anderson; B. K. Bollinger

1994-01-01

254

Urolithiasis and cystotomy in the rabbit.  

PubMed

Cystotomy is a surgical incision into the urinary bladder, which may be required for removal of calculi, diagnosis of tumors or refractory urinary tract infections, or repair of ectopic ureters and ruptured bladders. This column describes the indications and techniques for cystotomy in the rabbit. PMID:21326187

Brown, Cyndi

2011-03-01

255

Effect of Alkalinization on Calcium Oxalate Monohydrate Calculi during Extracorporeal Shock Wave Lithotripsy: In vivo Experiments  

Microsoft Academic Search

Previous in vitro experiments demonstrated the reduced microhardness of calcium oxalate monohydrate (COM) calculi, relative to dry values, when saturated with an alkaline solution (pH = 9.5). Nineteen patients with a COM calculus in the distal ureter which had been resistant to prior extracorporeal shock wave lithotripsy in situ, were treated when the stone was surrounded by alkaline urine. The

Hendrik Vandeursen; Dirk De Ridder; Ronny Demeulenaere; Geert Pittomvils; Rene Roving; Luc Baert

1992-01-01

256

The effect of ureteric stents on urine flow: Reflux  

Microsoft Academic Search

If the ureter becomes blocked, the resultant increased pressure may be relieved by inserting a double-J stent (a polymer tube, usually punctuated with holes). A major clinical problem associated with stent use is reflux (retrograde flow of urine from the bladder to the kidney), which may result in infections, scarring, and even renal failure. We develop a mathematical model, treating

L. J. Cummings; S. L. Waters; J. A. D. Wattis; S. J. Graham

2004-01-01

257

Postnatal morphology and functional capacity of the kidney following prenatal treatment with dinoseb in rats  

Microsoft Academic Search

Dinoseb has produced alterations that are suggestive of renal damage In mice and rats. Therefore it was of interest to determine the postnatal morphology and functional capacity of the kidney following prenatal treatment with dinoseb in rats. Fetal and neonatal rats treated with dinoseb on gestational d 10–12 had dilated renal pelves and ureters. Kidneys had dilated tubules and excessive

K. M. McCormack; A. Abuelgasim; V. L. Sanger; J. B. Hook

1980-01-01

258

Urinary Histology Rules Matrix  

Cancer.gov

Urinary Histo Renal Pelvis, Ureter, Bladder, and Other Urinary Histology Coding Rules Matrix C659, C669, C670-C679, C680-C689 (Excludes lymphoma and leukemia M9590-9989 and Kaposi sarcoma M9140) Rule Pathology/Cytology Specimen Histology Behavior Notes

259

Lack of major involvement of human uroplakin genes in vesicoureteral reflux: Implications for disease heterogeneity  

Microsoft Academic Search

Lack of major involvement of human uroplakin genes in vesicoureteral reflux: Implications for disease heterogeneity.BackgroundPrimary vesicoureteral reflux (VUR) is a hereditary disorder characterized by the retrograde flow of urine into the ureters and kidneys. It affects about 1% of the young children and is thus one of the most common hereditary diseases. Its associated nephropathy is an important cause of

SONGSHAN JIANG; JORDAN GITLIN; FANG-MING DENG; FENG-XIA LIANG; ANDY LEE; ANTHONY ATALA; Stuart B. Bauer; Garth D. Ehrlich; Sally A. Feather; Judith D. Goldberg; Judith A. Goodship; Timothy H. J. Goodship; MONIKA HERMANNS; FEN ZE HU; Katrin E. Jones; SUE MALCOLM; CATHY MENDELSOHN; Robert A. Preston; Alan B. Retik; Francis X. Schneck; VICTORIA WRIGHT; Xiang Y. Ye; Adrian S. Woolf; XUE-RU WU; HARRY OSTRER; ELLEN SHAPIRO; JUN YU; TUNG-TIEN SUN

2004-01-01

260

[Obstructive complications of endoscopic treatment of vesicoureteral reflux in children].  

PubMed

The study was aimed to the selection of patients, in which endoscopic treatment of vesicoureteral reflux (VUR) is contraindicated due to the high risk of the formation of obstructive hydroureteronephrosis (HUN). From June 1991 to December 2011, endoscopic treatment of I-V degree VUR was performed in more than 4,000 children aged 4 months to 17 years. In period of wide use of endoscopic technique, obstructive HUN occurred in average in 1 (0.5%) case of 200 VUR (5 cases in 5 children), only in IV degree reflux and in only in children with initial subcompensated obstruction of ureterovesical segment, which was manifested as flask-shaped extension of juxtavesical ureter on intravenous urograms. Ureterocystoneostomy allowed to resect the terminal ureter with encapsulated implants in 4 out of 5 children. The macroscopic and histological examination of biopsy specimens confirmed the correct position of the implant in all cases, which excluded the technical complications. Thus, persistent decompensation of urodynamics of upper urinary tract is the result of increased pressure profile of the terminal ureter, inevitable in the endoscopic treatment of UVR, in children with initial obstruction of ureterovesical segment. Therefore, endoscopic treatment is contraindicated for children with high-degree reflux and radiological signs of obstruction of the terminal ureter. PMID:23987055

Abdulaev, F K; Kulaev, V D; Nikolaev, V V

2013-01-01

261

Minimally Invasive Endourological Techniques may Provide a Novel Method for Relieving Urinary Obstruction due to Ureterosciatic Herniation  

PubMed Central

Ureterosciatic herniation, the protrusion of the hernia sac through the sciatic foramen, is an extremely rare cause of ureteral obstruction. We describe a case revealed by severe left back pain in a 72-year-old female. She was referred to our hospital for urological assessment of left hydronephrosis observed by ultrasonography. Intravenous ureterography (IVU) showed findings compatible with a left sciatic ureter, a dilated ureter with a fixed kinking, which is known as the ‘curlicue’ sign. We decided to attempt recovery of the herniated ureter using a retrograde approach. Ureteral stent placement was performed to decompress the dilated upper urinary tract. The ureterosciatic hernia was relieved with the passage of a flexible guide wire and a double-pigtail stent. Three months after ureteral stenting, she refused continuing to have an indwelling stent and the stent was removed. Thereafter, IVU revealed recurrent ureterosciatic hernia; however, there was no hydroureter or hydronephrosis. The patient is currently being under observation for 6 years after stenting and continues to be without hydronephrosis or symptoms. Placement of an internal stent possibly provides the rigidity to the ureter, thereby reducing the hernia and urinary obstruction. In the previous reports, most symptomatic patients have been treated surgically, with conservative therapy reserved for asymptomatic patients. For the patient who is elderly or a poor surgical candidate, retrograde stenting may provide safe reduction and efficacious treatment. This endourological approach provides a minimally invasive means for the management of urinary obstruction caused by ureterosciatic herniation.

Kato, Tomonori; Komiya, Akira; Ikeda, Ryoichi; Nakamura, Takeshi; Akakura, Koichiro

2015-01-01

262

EGF AND TGF ALPHA EXPRESSION INFLUENCE THE DEVELOPMENTAL TOXICITY OF TCDD: DOSE RESPONSE AND AHR PHENOTYPE IN EGF, TGF ALPHA AND EGF+TGF ALPHA KNOCKOUT MICE  

EPA Science Inventory

Abstract The environmental toxicant 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) produces cleft palate (CP) and hydronephrosis (HN) in mice. The etiology of these defects involves hyperproliferation of epithelial cells of the secondary palatal shelf and ureter, respectively. ...

263

Effect of urine on semen quality in turbot ( Psetta maxima)  

Microsoft Academic Search

The deleterious effects of urine contamination on the quality of spermatozoa were observed in turbot (Psetta maxima). In order to overcome this problem, two methods of sperm collection were compared to evaluate on urine contamination. When collected by stripping, the mean contamination rate of sperm by urine was 15.3% (urine volume: sperm volume). The catherization of ureter prior to sperm

Catherine Dreanno; Marc Suquet; Elizabeth Desbruyères; Jacky Cosson; Hervé Le Delliou; Roland Billard

1998-01-01

264

Peristaltic Pumping of Solid Particles in Viscoelastic Fluids J.C. CHRISPELL, L.J. FAUCI  

E-print Network

in viscoelastic fluids. Viscoelastic Fluid Model The time dependent Oldroyd-B model for viscoelastic fluid flowPeristaltic Pumping of Solid Particles in Viscoelastic Fluids J.C. CHRISPELL, L.J. FAUCI CENTER method of transport for fluids in the esophagus, intestine, oviduct, and ureter. Many biological fluids

Chrispell, John

265

Minimally Invasive Endourological Techniques may Provide a Novel Method for Relieving Urinary Obstruction due to Ureterosciatic Herniation.  

PubMed

Ureterosciatic herniation, the protrusion of the hernia sac through the sciatic foramen, is an extremely rare cause of ureteral obstruction. We describe a case revealed by severe left back pain in a 72-year-old female. She was referred to our hospital for urological assessment of left hydronephrosis observed by ultrasonography. Intravenous ureterography (IVU) showed findings compatible with a left sciatic ureter, a dilated ureter with a fixed kinking, which is known as the 'curlicue' sign. We decided to attempt recovery of the herniated ureter using a retrograde approach. Ureteral stent placement was performed to decompress the dilated upper urinary tract. The ureterosciatic hernia was relieved with the passage of a flexible guide wire and a double-pigtail stent. Three months after ureteral stenting, she refused continuing to have an indwelling stent and the stent was removed. Thereafter, IVU revealed recurrent ureterosciatic hernia; however, there was no hydroureter or hydronephrosis. The patient is currently being under observation for 6 years after stenting and continues to be without hydronephrosis or symptoms. Placement of an internal stent possibly provides the rigidity to the ureter, thereby reducing the hernia and urinary obstruction. In the previous reports, most symptomatic patients have been treated surgically, with conservative therapy reserved for asymptomatic patients. For the patient who is elderly or a poor surgical candidate, retrograde stenting may provide safe reduction and efficacious treatment. This endourological approach provides a minimally invasive means for the management of urinary obstruction caused by ureterosciatic herniation. PMID:25849669

Kato, Tomonori; Komiya, Akira; Ikeda, Ryoichi; Nakamura, Takeshi; Akakura, Koichiro

2015-01-01

266

Postpartum vaginal cystic lesions: everyday practice or a differential diagnosis challenge?  

PubMed Central

Postpartum vaginal cystic lesions constitute a common situation that is caused either by inflammation or by accumulation of lymph. We report a case of a 33-year-old woman who had bilateral duplication of the pelvicalyceal system and ureter, and after the labor of her second child, she had one ureter prolapse into the vagina after initially appearing as a cystic lesion. Ureteral duplication is the most common renal abnormality, occurring in approximately 1% of the population and in 10% of children who are diagnosed with urinary tract infections. In our case we consider possible that this clinical situation was a result of a combination of postpartum pelvic floor trauma and prolapse of the ureter. There are only several of these cases in the literature where ureter prolapse is associated and complicated by pelvic floor trauma caused during or after labor. The clinical approach of the cystic lesions located in the vagina during the postpartum period should include a meticulous examination of the urinary system before any other medical practice. PMID:23803247

2013-01-01

267

Fuzzy signal detection theory: analysis of human and machine performance in air traffic control, and analytic considerations  

Microsoft Academic Search

This paper applies fuzzy SDT (signal detection theory) techniques, which combine fuzzy logic and conventional SDT, to empirical data. Two studies involving detection of aircraft conflicts in air traffic control (ATC) were analysed using both conventional and fuzzy SDT. Study 1 used data from a preliminary field evaluation of an automated conflict probe system, the User Request Evaluation Tool (URET).

ANTHONY MASALONIS; RAJA PARASURAMAN

2003-01-01

268

Ionizing radiation and kidney cancer among Japanese atomic bomb survivors.  

PubMed

Understanding of the role of radiation as a cause of kidney cancer remains limited. The most common types of kidney cancer are renal cell carcinoma and renal pelvis carcinoma. It has been posited that these entities differ in their degree of radiogenicity. Recent analyses of cancer incidence and mortality in the Life Span Study (LSS) of Japanese atomic bomb survivors have examined associations between ionizing radiation and renal cell carcinoma, but these analyses have not reported results for cancer of the renal pelvis and ureters. This paper reports the results of analyses of kidney cancer incidence during the period 1958-1998 among 105,427 atomic bomb survivors. Poisson regression methods were used to derive estimates of associations between radiation dose (in sievert, Sv) and cancer of the renal parenchyma (n = 167), and cancer of the renal pelvis and ureter (n = 80). Heterogeneity by cancer site was tested by joint modeling of cancer risks. Radiation dose was positively associated with cancers of the renal pelvis and ureter [excess relative rate (ERR)/Sv = 1.65; 90% confidence interval (CI): 0.37, 3.78]. The magnitude of this association was larger than the estimated association between radiation dose and cancer of the renal parenchyma (ERR/Sv = 0.27; 90% CI = -0.19, 0.98). While the association between radiation and cancer of the renal parenchyma was of greater magnitude at ages <55 years (ERR/Sv = 2.82; 90% CI = 0.45, 8.89) than at older attained ages (ERR/Sv = -0.11; 90% CI = nd, 0.53), the association between radiation and cancers of the renal pelvis and ureter varied minimally across these categories of attained age. A test of heterogeneity of type-specific risks provides modest support for the conclusion that risks vary by kidney cancer site (LRT = 2.34, 1 d.f., P = 0.13). Since some studies of radiation-exposed populations examine these sites in aggregate, results were also derived for the combined category of cancer of the renal parenchyma, renal pelvis and ureters. Overall, there was a positive association between radiation and the combined category of cancer of the renal parenchyma, renal pelvis and ureters (ERR/Sv = 0.60, 90% CI: 0.09, 1.30). Updated follow-up of the LSS cohort provides substantial additional information on the association between radiation and cancer of the renal pelvis and ureter, a site not examined in recent reports on analyses of these data. The results are suggestive of differences between the different regions of the kidney in sensitivity to the carcinogenic effects of ionizing radiation. PMID:20518663

Richardson, David B; Hamra, Ghassan

2010-06-01

269

Durability of anti-reflux effect of ureteral reimplantation for primary vesicoureteral reflux: findings on long-term cystography  

PubMed Central

Objectives Ureteral reimplantation (UR) is the gold standard for the surgical treatment of vesicoureteral reflux (VUR) but few studies have documented its long-term results. We reviewed late cystography (LC) results following successful UR. Methods We performed a retrospective chart review of all children with primary VUR who underwent successful open UR (grade 0 VUR into the reimplanted ureter(s) on initial cystogram) at our institution from January 1990 – December 2002. We identified successful UR patients who underwent LC ? 1 year after UR and reviewed the results for the presence of recurrent VUR into the reimplanted ureter(s). Results 794 patients underwent successful open UR for primary VUR, of whom 60 (7.6%) had a subsequent LC. Preoperative VUR grade was ?II in 20 (34.5%), ?III in 38 (65.5%). Median age at UR was 3.5 years (IQR: 1.3–6.2 years); 51 (85%) were female. UR was intravesical in 45 (75%) and bilateral in 19 (32%). LC was performed at a median of 38.7 months after UR (IQR: 19.6–66.1 months). Indication for LC was febrile UTI in 16 (27%), non-febrile UTI’s in 15 (25%), follow-up of contralateral VUR in 16 (27%) and other clinical indications in 13 (21%). The recurrence rate was 0%; of the 79 reimplanted ureters, 100% (95% CI: 95.4–100) had no VUR (grade 0). Conclusions Among children who underwent successful open UR for primary VUR, there was no VUR recurrence on extended follow-up. This suggests that the late durability of open anti-reflux surgery is excellent. PMID:22245304

Hubert, Katherine C.; Kokorowski, Paul J.; Huang, Lin; Prasad, Michaella M.; Rosoklija, Ilina; Retik, Alan B.; Nelson, Caleb P.

2013-01-01

270

Endoscopic Subureteral Injection for the Treatment of Vesicoureteral Reflux in Children: Polydimethylsiloxane (Macroplastique®) versus Dextranomer/Hyaluronic Acid Copolymer (Deflux®)  

PubMed Central

Purpose The aim of this study was to compare cure rates and complications of polydimethylsiloxane (Macroplastique®) and dextranomer/hyaluronic acid copolymer (Deflux®) in the treatment of vesicoureteral reflux (VUR). Materials and Methods From April 2001 to March 2008, 29 boys and 42 girls (total of 115 ureters) with a mean age of 6 years who had undergone endoscopic subureteral transurethral injection for VUR were enrolled. A single subureteral injection of Macroplastique was performed in 31 ureters in 23 children (group I; grade II: 4; grade III: 12; grade IV: 9; grade V: 6), and a single subureteral injection of Deflux was performed in 84 ureters in 48 children (group II; grade II: 24; grade III: 14; grade IV: 25; grade V: 21). Renal ultrasound was done 1 day after injection, and voiding cystourethrography (VCUG) was done at 3 months. Successful reflux correction was defined as absent or grade I reflux on follow-up VCUG. Results No significant difference in success rates was observed between group I and group II [80.6% (25/31) vs. 78.6% (66/84), respectively, p>0.05]. The following postoperative complications developed: ureteral obstruction in 2 ureters of group I and 3 ureters of group II, asymptomatic urinary tract infection in 3 patients of group I and 2 patients of group II, and bladder calcification by erosion or mucosal necrosis in 2 patients of group I. Conclusions Despite differences in material properties, both Macroplastique and Deflux were safe for the treatment of children with VUR. Because of the risk of bladder mucosal necrosis and substantial decreases in volume after implantation, long-term follow-up is required. PMID:20414426

Bae, Young Dae; Park, Min Gu; Oh, Mi Mi

2010-01-01

271

Percutaneous nephrostomy Balloon dialatation  

E-print Network

Objective: We wanted to present the results of percutaneous management of ureteral injuries that were diagnosed late after cesarean sections (CS). Materials and Methods: Twenty-two cases with 24 ureteral injuries that were diagnosed late after CS underwent percutaneous nephrostomy (PN), antegrade double J (DJ) catheter placement and balloon dilatation or a combination of these. The time for making the diagnosis was 21 50.1 days. The injury site was the distal ureter in all cases (the left ureter: 13, the right ureter: 7 and bilateral: 2). Fifteen complete ureteral obstructions were detected in 13 cases. Ureteral leakage due to partial (n = 4) or complete (n = 3) rupture was noted in seven cases. Two cases had ureterovaginal fistula. All the cases were initially confirmed with antegrade pyelography and afterwards they underwent percutaneous nephrostomy. Balloon dilatation was needed in three cases. Antegrade DJ stents were placed in 10 cases, including the three cases with balloon dilatation. Repetititon of percutaneous nephrostomy with balloon dilatation and DJ stent placement was needed in one case with complete obstruction. All the cases were followed-up with US in their first week and then monthly thereafter for up to two years. Results: Eighteen ureters (75%) were managed by percutaneous procedures alone. A total of six ureter injuries had to undergo surgery (25%). Conclusion: Percutaneous management is a good alternative for the treatment of post-CS ureteral injuries that are diagnosed late after CS. Percutaneous management is at least preparatory for a quarter of the cases where surgery is unavoidable.

2007-01-01

272

Experimental infection of native human ureteral tissue with Neisseria gonorrhoeae: adhesion, invasion, intracellular fate, exocytosis, and passage through a stratified epithelium.  

PubMed Central

The exact mechanisms by which Neisseria gonorrhoeae invades the mucosal lining to cause local and disseminated infections are still not fully understood. The ability of gonococci to infect the human ureter and the mechanism of gonococcal infection in a stratified epithelium were investigated by using distal ureters excised from healthy adult kidney donors. In morphological terms, this tissue closely resembles parts of the urethral proximal epithelium, a site of natural gonococcal infection. Using piliated and nonpiliated variants of N. gonorrhoeae MS11, we demonstrated the importance of pili in the attachment of gonococci to native epithelial cells as well as their association with epithelial damage. By electron microscopy we elucidated the different mechanisms of colonization and invasion of a stratified epithelium, including adherence to surface cells, invasion and eventual release from infected cells, disintegration of intercellular connections followed by paracellular tissue infiltration, invasion of deeper cells, and initiation of cellular destruction and exfoliation resulting in thinning of the mucosa. PMID:9234803

Mosleh, I M; Boxberger, H J; Sessler, M J; Meyer, T F

1997-01-01

273

Simultaneous Colonic Obstruction and Hydroureteronephrosis due to Mesenteric Fibromatosis  

PubMed Central

Mesenteric fibromatosis (MF) is a rare benign mesenchymal lesion that can occur throughout the gastrointestinal tract, especially small bowel. Its biological behavior is intermediate between benign fibrous tissue proliferation and malignant fibrosarcoma. In previously reported cases of MF, we could find colonic obstruction or ureter obstruction, but simultaneous involvement of colon and ureter was not able to be seen. We described a patient that presented with colonic obstruction and hydroureteronephrosis due to MF at sigmoid colon which mimicked submucosal tumor such as gastrointestinal tumor. This case resulted in a positive positron emission tomography scan suggesting malignant neoplasm, but ?-catenin positivity on immunohistochemical staining separated MF from gastrointestinal stromal tumor and sclerosing mesenteritis. The clinical course of the patient was improved after surgical resection. PMID:20431749

Jung, Sung Hoon; Jung, Ji Han; Lee, Kang-Moon; Chung, Woo Chul; Yang, Jin-Mo

2009-01-01

274

Simultaneous Colonic Obstruction and Hydroureteronephrosis due to Mesenteric Fibromatosis.  

PubMed

Mesenteric fibromatosis (MF) is a rare benign mesenchymal lesion that can occur throughout the gastrointestinal tract, especially small bowel. Its biological behavior is intermediate between benign fibrous tissue proliferation and malignant fibrosarcoma. In previously reported cases of MF, we could find colonic obstruction or ureter obstruction, but simultaneous involvement of colon and ureter was not able to be seen. We described a patient that presented with colonic obstruction and hydroureteronephrosis due to MF at sigmoid colon which mimicked submucosal tumor such as gastrointestinal tumor. This case resulted in a positive positron emission tomography scan suggesting malignant neoplasm, but beta-catenin positivity on immunohistochemical staining separated MF from gastrointestinal stromal tumor and sclerosing mesenteritis. The clinical course of the patient was improved after surgical resection. PMID:20431749

Jung, Sung Hoon; Paik, Chang Nyol; Jung, Ji Han; Lee, Kang-Moon; Chung, Woo Chul; Yang, Jin-Mo

2009-09-01

275

[Efficiency of endoscopic treatment of primary vesicoureteral reflux depending on bulking agent].  

PubMed

From June 1991 to December 2011, endoscopic treatment of vesicoureteral reflux (VUR) was performed more than in 4,000 children aged 4 months to 17 years. As bulking agents, teflon paste, DAM +, urodex, and vantris were used. A comparative evaluation of the effectiveness of single endoplasty with various bulking agents in children with I-V degree primary VUR, who had no gross congenital abnormalities in ureterovesical anastomosis, such as paraureteral diverticula, complete duplicated ureter or extravesicalisation of ureter, and not suffered from chronic cystitis, was performed. It was found that the use of Teflon paste led to elimination of reflux in 102 (95.3%) of 107 patients, vantris--in 52 (92.9%) of 56 patients, DAM(+)--in 145 (77.8%) of 186, urodex--in 47 (68.1%) of 69 patients. Among modern bulking agents meet all safety requirements, vantris is recommended for the optimal treatment of vesicoureteral reflux in children. PMID:23789372

Abdullaev, F K; Kulaev, V D; Nikolaev, V V

2013-01-01

276

[The persisting mesonephric duct with contralateral cryptorchism and ipsilateral renal aplasia: a case report].  

PubMed

A 30-year-old man with azoospermia underwent an examination for infertility. He had a history of right orchiopexy due to cryptorchism. Radiological examinations showed an absence of the left kidney and the left seminal vesicle. A testicular biopsy revealed normal spermatogenesis in the left testis, but no spermatogenesis in the right testis. The right vasograph demonstrated obstruction of the vas deferens at the inguinal region. The left vasograph showed that the left vas drained into a cystic lesion, which then drained into the bladder neck. The left ureter was connected to this cystic lesion. The final diagnosis was a persistent mesonephric duct which was open to the bladder neck. The pathogenesis of the persistent mesonephric duct combined with the ectopic opening of the ureter and the vas deferens is discussed. The patient was treated by testicular extraction of the testicular sperm, and intracytoplasmic sperm injection. PMID:18516928

Inoue, Takaaki; Muguruma, Kouei; Hukui, Katuya; Thizaki, Ryusuke; Hiura, Yoshihito; Kinoshita, Hidehumi; Matuda, Tadashi

2008-04-01

277

Supernumerary kidney laparoscopically treated  

PubMed Central

Congenital anomalies of the kidney and urinary tract are part of a family of diseases with different anatomical origins. Duplicated collecting systems can be defined as a renal unit containing 2 pyelocalyceal systems associated with a single ureter or with double ureters. The supernumerary kidney is a definitive accessory organ with its own collecting system, blood supply, and distinct encapsulated parenchima. The true incidence of supernumerary kidney remains unknown, but most cases are in males, are unilateral and on the left side. We present a case of an adult woman with a hypoplastic supernumerary kidney with a complete ureteral duplication and an ectopic junction. The case has been laparoscopically treated. We demonstrate that a laparoscopic nephro-ureterectomy is feasible and that the management of the complication (urinoma and fistula) can be managed conservatively. PMID:24282475

Innocenzi, Michele; Casale, Paolo; Alfarone, Andrea; Ravaziol, Michele; Cattarino, Susanna; Grande, Pietro; Minisola, Francesco; Gentilucci, Alessandro; Gentile, Vincenzo; Sciarra, Alessandro

2013-01-01

278

Subtle renal duplication as an unrecognized cause of childhood incontinence: diagnosis by magnetic resonance urography.  

PubMed

Urinary incontinence in young girls who have been toilet trained may be due to an ectopic ureter inserting below the urinary sphincter. This diagnosis is frequently delayed, is psychologically distressing, and may be missed at physical examination. Findings at ultrasound evaluation may be subtle and imaging with computed tomography or intravenous urography exposes young patients to ionizing radiation. We report two cases of girls with urinary incontinence where magnetic resonance (MR) urography revealed subtle renal duplication which implied the presence of an ectopic duplicated ureter with infrasphincteric insertion. These cases stress the importance of examining the kidneys, rather than the perineum, at MR, ultrasound and intravenous urogram evaluation, and show the value of MR urography as a safe alternative to computed tomography and intravenous urography for making this diagnosis. PMID:18790427

Lipson, Jafi A; Coakley, Fergus V; Baskin, Laurence S; Yeh, Benjamin M

2008-10-01

279

Supernumerary kidney laparoscopically treated.  

PubMed

Congenital anomalies of the kidney and urinary tract are part of a family of diseases with different anatomical origins. Duplicated collecting systems can be defined as a renal unit containing 2 pyelocalyceal systems associated with a single ureter or with double ureters. The supernumerary kidney is a definitive accessory organ with its own collecting system, blood supply, and distinct encapsulated parenchima. The true incidence of supernumerary kidney remains unknown, but most cases are in males, are unilateral and on the left side. We present a case of an adult woman with a hypoplastic supernumerary kidney with a complete ureteral duplication and an ectopic junction. The case has been laparoscopically treated. We demonstrate that a laparoscopic nephro-ureterectomy is feasible and that the management of the complication (urinoma and fistula) can be managed conservatively. PMID:24282475

Innocenzi, Michele; Casale, Paolo; Alfarone, Andrea; Ravaziol, Michele; Cattarino, Susanna; Grande, Pietro; Minisola, Francesco; Gentilucci, Alessandro; Gentile, Vincenzo; Sciarra, Alessandro

2013-01-01

280

Upper and midureteral calculi: Percutaneous extraction with an occlusion balloon catheter  

SciTech Connect

In 44 patients with one or more calculi in the upper two-thirds of the ureter, single-stage percutaneous nephrolithotomy was performed through a middle or upper calyceal nephrostomy after cystoscopic placement of an occlusion balloon catheter distal to the calculus; in 42, the procedure was successful. The occlusion balloon catheter permitted retrograde opacification of all systems for enhanced renal puncture. In the last 30 patients an attempt was made either to push the calculus upward mechanically or to flush it upward into the renal pelvis with carbon dioxide or dilute contrast material. This was successful in 24 of these patients. Prior overnight occlusion of the ureter by means of ureteral dilatation further facilitates dislodgement of the calculus, which was successful in 12 of 13 patients.

Beckmann, C.F.; Roth, R.A.; Luedke, M.D.

1986-06-01

281

Ureteral Penetration Caused by Drilling During Internal Pelvic Bone Fixation: Delayed Recognition  

PubMed Central

A 49-year-old man was referred to our department with profuse serous fluid discharge from a Penrose drain after undergoing internal fixation with metal screws for multiple pelvic bone fractures. A definite ureteral penetration was identified that was orientated from the lateral to the medial aspect of the right distal ureter. The patient was surgically treated with excision of the 2-cm injured ureteral segment, end-to-end ureteroureterostomy, and double J ureteral stent placement. To our knowledge, a penetrating ureteral injury caused by bone drilling has not been reported previously in the published literature. This case shows that surgeons who do pelvic surgery, including orthopedic surgeons, should be familiar with the anatomical relationship of the ureter and its potential injuries. PMID:23869275

Shin, Yu Seob; Park, Jong Hyuk; Raheem, Omer A.; Kim, Hyung Jin; Kim, Young Gon

2013-01-01

282

Diffuse Calcification of the Urinary System and Miliary Tuberculosis Due To Delayed Diagnosis of Genitourinary Tuberculosis: A Case Report  

PubMed Central

Genitourinary tuberculosis (GUTB) is difficult to diagnose in the earlier stage owing to the non-specific symptoms. Usually, renal tuberculous involvement is unilateral and the imaging finding is renal calcification, but associated calcifications of bilateral ureter and bladder are rare. We report a 66-year-old man who presented with diffuse calcification of the urinary system (including bilateral pelvicalyceal system, both ureters and bladder) and disseminated miliary tuberculosis due to GUTB. He had been misdiagnosed with urinary tract infection and urinary lithiasis for two years before the diagnosis of GUTB was confirmed by microbiological examination of the urine. This case highlights the importance of maintaining a high index of clinical suspicion for GUTB.

CHEN, Hairong; LIU, Yubo; WU, Dawei

2015-01-01

283

Successful treatment of chyluria, glomerular and tubular abnormalities in a young lady with silver nitrate instillation.  

PubMed

A 21- year-old lady presented with chyluria, severe malnutrition, secondary amenorrhea, profound hypoalbuminemia, heavy proteinuria and renal tubular abnormalities suggestive of Type IV renal tubular acidosis. No particular cause for chyluria could be ascertained. She was successfully treated with an injection of 2% silver nitrate into the left ureter and urinary bladder. She continues to be well after 15 years of follow-up. PMID:17496400

Abraham, Georgi; Pratap, Balaji; Govindan, Priyanka; Matthew, Milly

2007-06-01

284

Technetium-99m DMSA imaging and the obstructed kidney  

SciTech Connect

Although several authors have claimed that the function of an obstructed kidney could be overestimated on Tc-99m DMSA imaging, the clinical importance of such an overestimation has not been well documented. Partial obstruction of one ureter was created in a rat, and a relative Tc-99m DMSA uptake was obtained 4 hours after intravenous injection. By puncture of the isolated obstructed kidney, it was shown that the function of that kidney was overestimated by at least 17%.

Piepsz, A.; Ham, H.R.; Roland, J.H.; Froideville, J.L.; Kinthaert, J.; Hall, M.; Verboven, M.; Collier, F.

1986-06-01

285

The value of ureterocolostomy in the male Felis domestica  

E-print Network

- Closure of surgical incision . . . . 51 52 I. Tgg PRSL19l Urethral occlusion in the male cat from mucous plugs and urinary calculi is a serious problem in the practice of veterinary medicine. Urinary calculi mey be found in the kidney, ureter... in 1936 that sodium salicylate inhibited th? precipitation of urinary colloids. Cessatioa of therapy was associated with the same rate snd severity of recurrenos of reasl calculi that existed prior to institution of therapy. L. SLQSICAL ISTSRVERTIOH...

Beamer, Russell James

1958-01-01

286

Evidence suggesting a genetic contribution to kidney stone in northeastern Thai population  

Microsoft Academic Search

Genetic factor may play a role in the pathogenesis of kidney stone that is found in the northeastern (NE) Thai population.\\u000a Herein, we report initial evidence suggesting genetic contribution to the disease in this population. We examined 1,034 subjects\\u000a including 135 patients with kidney stone, 551 family members, and 348 villagers by radiography of kidney–ureter–bladder (KUB)\\u000a and other methods, and

Suchai Sritippayawan; Sombat Borvornpadungkitti; Atchara Paemanee; Chagkrapan Predanon; Wattanachai Susaengrat; Duangporn Chuawattana; Nunghathai Sawasdee; Sirintra Nakjang; Suttikarn Pongtepaditep; Choochai Nettuwakul; Nanyawan Rungroj; Somkiat Vasuvattakul; Prida Malasit; Pa-thai Yenchitsomanus

2009-01-01

287

Tamoxifen for retroperitoneal fibrosis.  

PubMed Central

Retroperitoneal fibrosis, either idiopathic or associated with aortic inflammatory aneurysm, is a chronic fibrotic disease that causes progressive obstruction of ureters and vessels around the lower abdominal aorta. Treatment is often difficult (surgery) or hazardous (steroids). We report a case of a woman with retroperitoneal fibrosis associated with aortic inflammatory aneurysm, who was successfully treated with oral tamoxifen. Images Figure 1 Figure 2 PMID:9497980

Frankart, L.; Lorge, F.; Donckier, J.

1997-01-01

288

Laparoscopic infrared imaging  

Microsoft Academic Search

.   A system was developed to determine the potential role of infrared imaging as a tool for localizing anatomic structures and\\u000a assessing tissue viability during laparoscopic surgical procedures. A camera system sensitive to emitted energy in the midinfrared\\u000a range (3–5 ?m) was incorporated into a two-channel visible laparoscope. Laparoscopic cholecystectomy, dissection of the ureter,\\u000a and assessment of bowel perfusion were

W. W. Roberts; T. A. Dinkel; P. G. Schulam; L. Bonnell; L. R. Kavoussi

1997-01-01

289

Multiple, Bilateral Fibroepithelial Polyps Causing Acute Renal Failure in a Gastric Cancer Patient  

PubMed Central

We report a case of primary fibroepithelial polyps (FEPs) in the middle of both ureters in a patient with advanced gastric cancer and acute renal failure. Ureteral FEPs are rare benign lesions, and multiple, bilateral lesions are extremely rare. To our knowledge, this report is the seventh case of bilateral FEPs in the literature. Our case has clinical implications because FEPs should be considered as a cause of ureteral obstruction inducing acute renal failure in advanced gastric cancer. PMID:20358014

Kim, Sun-Ouck; Youn, Chul Woong; Im, Chang Min; Jung, Sung Il; Oh, Kyung Jin; Kwon, Dongdeuk; Park, Kwangsung; Ryu, Soo Bang

2010-01-01

290

Multiple, bilateral fibroepithelial polyps causing acute renal failure in a gastric cancer patient.  

PubMed

We report a case of primary fibroepithelial polyps (FEPs) in the middle of both ureters in a patient with advanced gastric cancer and acute renal failure. Ureteral FEPs are rare benign lesions, and multiple, bilateral lesions are extremely rare. To our knowledge, this report is the seventh case of bilateral FEPs in the literature. Our case has clinical implications because FEPs should be considered as a cause of ureteral obstruction inducing acute renal failure in advanced gastric cancer. PMID:20358014

Kim, Sun-Ouck; Youn, Chul Woong; Kang, Taek Won; Im, Chang Min; Jung, Sung Il; Oh, Kyung Jin; Kwon, Dongdeuk; Park, Kwangsung; Ryu, Soo Bang

2010-04-01

291

Epithelial transformation of metanephric mesenchyme in the developing kidney regulated by Wnt4  

Microsoft Academic Search

THE kidney has been widely exploited as a model system for the study of tissue inductions regulating vertebrate organogenesis1,2. Kidney development is initiated by the ingrowth of the Wolfian duct-derived ureteric bud into the presumptive kidney mesenchyme. In response to a signal from the ureter, mesenchymal cells condense, aggregate into pretubular clusters and undergo an epithelial conversion generating a simple

Kevin Stark; Seppo Vainio; Galya Vassileva; Andrew P. McMahon

1994-01-01

292

Case report: Retroperitoneal fibrosis simulating local relapse of sarcomatoid renal cell carcinoma  

Microsoft Academic Search

Background: Generally, retroperitoneal fibrosis is an idiopathic process that envelopes and displaces ureters, causing hydronefrosis\\u000a and renal failure. CT scan is the best choice for diagnosis. Other aetiologies described are malignancies, drugs, aorta aneurisms\\u000a and immunological or rheumatological diseases. Case presentation: A 53-year-old male with hypertension and diabetes was operated on radical nephrectomy for renal mass. Pathological examination\\u000a showed sarcomatoid

Salvador Esquena; José Maria Abascal; Enrique Trilla; Inés De Torres; Juan Morote

2006-01-01

293

Perinephric Urinoma Due to Locally Advanced Recto-Sigmoid Tumor: Incidental Finding on Bone Scan  

PubMed Central

We are presenting a 59 years old man with locally advanced recto-sigmoid colon cancer; complaining of left flank pain and bone scan was done to rule out bone metastases. Findings in bone scan were suggesting left renal obstruction, but further SPECT/CT imaging to localize the uptake revealed a perinephric collection likely due to leak from the left ureter close to tumor site. PMID:25191129

Al Tamimi, Ammad Shanoon Marzooq; Magsombol, Butch; Ng, Arthur; Ng, David

2014-01-01

294

Perinephric urinoma due to locally advanced recto-sigmoid tumor: incidental finding on bone scan.  

PubMed

We are presenting a 59 years old man with locally advanced recto-sigmoid colon cancer; complaining of left flank pain and bone scan was done to rule out bone metastases. Findings in bone scan were suggesting left renal obstruction, but further SPECT/CT imaging to localize the uptake revealed a perinephric collection likely due to leak from the left ureter close to tumor site. PMID:25191129

Al Tamimi, Ammad Shanoon Marzooq; Magsombol, Butch; Ng, Arthur; Ng, David

2014-05-01

295

Failure of ureteral replacement with gore-tex tube grafts  

Microsoft Academic Search

Objectives. To evaluate the role of polytetrafluoroethylene (Gore-Tex) as a ureteral substitute in dogs after resection of a 5 to 8-cm-long middle segment.Methods. Five mongrel dogs underwent resection of the middle segment of the left ureter and segmental replacement of the resected part with segments of Gore-Tex over a double-J catheter. The double-J stents were removed at 21 days and

Sümer Baltaci; Gökhan Özer; Elif Özer; Tarkan Soygür; Ömer Be?alti; Kadri Anafarta

1998-01-01

296

Rare case of non-refluxing non-obstructive megaureter in an adult  

Microsoft Academic Search

Non-refluxing non-obstructive megaureter is a rare condition, usually diagnosed in asymptomatic neonates. We present the case\\u000a of a 39-year-old male, who presented with a 6-month history of recurrent UTIs and intermittent frank haematuria. IVU, flexible\\u000a cystoscopy and micturating cystogram confirmed characteristically dilated ureters, without evidence of reflux or obstruction.\\u000a We review the aetiology, investigation and management of this rare condition.

Lyndsay Fraser; Mohammed Hidayath Khan; Marjorie Ross; Peter J. Patterson

2007-01-01

297

Ureterocystoplasty: a novel approach to augment small capacity urinary bladder in adults  

Microsoft Academic Search

Ureterocystoplasty is a novel operation well suited for patients having small capacity urinary bladder with unilateral poorly\\u000a functioning kidney and megaureter. The megaureter is detubularized and used for urinary bladder augmentation. The ureter lining\\u000a has advantage of being non-secretory and free from the metabolic complications of enterocystoplasty. This operation is mainly\\u000a done in children. This is one of the very

Vishwajeet Singh; Rahul Janak Sinha; S. N. Sankhwar

2009-01-01

298

The Prune Belly syndrome: urological aspects and long-term outcomes of a rare disease  

PubMed Central

Prune-Belly syndrome is a disorder characterized by the following triad of symptoms: deficiency of the abdominal muscles, malformations of the urinary tract and bilateral cryptorchidism. This study included a total of 16 patients. The findings included clinical characteristics, diagnostics, therapy and long-term clinical outcomes. All patients were asked to complete a questionnaire and, in some cases, were given further examination. All patients were diagnosed with congenital aplasia of the abdominal wall and a variety of urogenital malformations. Cryptorchidism was present in 11 patients (68.8%), malformations of the prostate in 3 (18.8%), urethral malformations in 8 (50%) and mega-ureter in 14 patients (87.5%). A mega-bladder was observed in 13 patients (81.3%). Distinctive renal malformations, such as renal dysplasia, in 3 patients (18.8%) and hydronephrosis in 9 patients (56.3%), respectively. Abdominoplasty was performed on 4 patients (25%). Urethral surgery was performed in 10 patients (62.5%). Seven patients (43.8%) required ureter surgery, most of which involved re-implantation of the ureter and, in some cases, additional ureter modeling. Renal surgery was performed on 5 patients. Four patients with non-functioning kidneys with hydronephrosis underwent a nephrectomy and one patient pyeloplasty. We demonstrate that successful treatment is possible even in cases of serious and complex malformations, such as those of the Prune-Belly syndrome. Treatment must be tailored to the individual patient. The severity of the renal dysplasia is the main prognostic factor. PMID:22802998

Zugor, Vahudin; Schott, Günter E.; Labanaris, Apostolos P.

2012-01-01

299

Pitfalls of cholescintigraphy. A case report  

SciTech Connect

A /sup 99m/Tc PIPIDA scan was performed in a young auto accident victim who had a transient rise in serum bilirubin level. Initially, the stasis of activity in the right ureter was mistaken for activity in the common bile duct. Misinterpretation of biliary imaging studies can be prevented with awareness of pitfalls and readiness to obtain delayed images and additional images in different projections.

Strickler, S.; Park, H.M.

1982-12-01

300

Cancer Research Repository for Individuals With Cancer Diagnosis and High Risk Individuals.  

ClinicalTrials.gov

Pancreatic Cancer; Thyroid Cancer; Lung Cancer; Esophageal Cancer; Thymus Cancer; Colon Cancer; Rectal Cancer; GIST; Anal Cancer; Bile Duct Cancer; Duodenal Cancer; Gallbladder Cancer; Gastric Cancer; Liver Cancer; Small Intestine Cancer; Peritoneal Surface Malignancies; Familial Adenomatous Polyposis; Lynch Syndrome; Bladder Cancer; Kidney Cancer; Penile Cancer; Prostate Cancer; Testicular Cancer; Ureter Cancer; Urethral Cancer; Hypopharyngeal Cancer; Laryngeal Cancer; Lip Cancer; Oral Cavity Cancer; Nasopharyngeal Cancer; Oropharyngeal Cancer; Paranasal Sinus Cancer; Nasal Cavity Cancer; Salivary Gland Cancer; Skin Cancer; CNS Tumor; CNS Cancer; Mesothelioma

2014-12-12

301

Deletion (11)(q14.1q21)  

Microsoft Academic Search

The authors report on a 4-year-old girl with moderate development delay, horseshoe kidney, bilateral duplication of the ureters with right upper pole obstruction, hydronephrosis and nonfunction, and subsequent Wilms tumor of the right lower pole. She had an interstitial deletion of the long arm of chromosome 11 involving the region 11(q14.1q21). 22 refs., 2 figs., 1 tab.

Robert F. Stratton; Kenneth H. Lazarus; Elizabeth J. L. Ritchie; Ann Marie Bell

1994-01-01

302

[Kidney duplication with ureteropelvic junction obstruction in childhood: retroperitoneoscopic pyeloplasty].  

PubMed

Laparoscopic pyeloplasty for the treatment of ureteropelvic junction obstruction (UPJO) in children is still one of the most demanding operations in urology. We report on a 12-year-old boy with UPJO in a duplicated collecting system with high ureter fissus. He was admitted with a 1-year history of recurrent flank pain and dilation of the lower duplicated collecting system. We performed a retroperitoneoscopic Anderson-Hynes pyeloplasty. PMID:20464366

Subotic, S; Reichenbach-Klinke, E

2010-11-01

303

Ureteral duplication with lower pole ectopia to the vas: A case report of an exception to the weigert-meyer law  

Microsoft Academic Search

We report an unusual case of ureteral duplication with lower-pole ectopia and ureterolithiasis, which violates the Weigert-Meyer law. The duplicated ureter arose from a lower-pole calyx and drained inferiorly into the ipsilateral vas. A presentation of the case is followed by a comparison to the only known similar one, reported in 1988. A possible embryologic hypothesis for this anomaly is

Bruce L. Slaughenhoupt; H. David Mitcheson; David L. Lee

1997-01-01

304

Fetal ureteral dilatation: evolution and current problems in management  

Microsoft Academic Search

The management of 35 dilated ureters in 26 newborns admitted on the basis of a prenatal diagnosis is reviewed. Cases were divided according to the etiology of the ureteral dilatation after complete investigation (intravenous pyelogram, micturating cystogram, Tc-DTPA diuretic renogram). Primary non-obstructive\\/non-refluxing dilatations were managed conservatively, as were most of those secondary to bladder outlet obstruction after valve fulguration. Most

A. Calisti; C. Manzoni; S. Celli; L. Perrelli; G. D'Errico; L. Masini

1990-01-01

305

Robotically assisted radical laparoscopic prostatectomy in a patient with ectopic ureteral insertion into the prostate  

Microsoft Academic Search

Robotically assisted laparoscopic radical prostatectomy (RaLRP) has become an alternative surgical treatment option for patients\\u000a with localized prostate cancer. Rare anatomic variations result in modification of established techniques. We describe the\\u000a first successful completion of RaLRP for localized prostate cancer in a patient with coexisting complete left ureteral duplication\\u000a and ectopic insertion of the upper pole moiety ureter into the

Scott G. Hubosky; John W. Davis; Robert W. Given; Michael D. Fabrizio

2007-01-01

306

Unusual anatomic presentation of ectopic ureteroceles  

Microsoft Academic Search

The authors describe four patients with unusual anatomic presentation of ectopic ureteroceles and their surgical treatment. Over a 3-year period, four cases of unusual ectopic ureteroceles were encountered. A 6-month-old girl had a complex cloacal anomaly with an ectopic ureterocele within an ectopic ureterocele combined with a blind-ending ipsilateral ureter. A 3-year-old girl had an ectopic ureterocele combined with a

Eugene Minevich; Ali Moayed; Jeffrey Wacksman; Alfor G Lewis; Curtis A Sheldon

1999-01-01

307

Surgical management of complete ureteric duplication abnormalities  

Microsoft Academic Search

In 2 decades (1974–1993), the senior author (S.A.) managed 148 patients with various abnormalities associated with complete\\u000a ureteric duplication. Included were 72 patients with primary vesicoureteric reflux, 50 with ureteroceles, and 26 with upper-pole\\u000a ectopic ureters. The majority of the patients were female, and the common clinical presentations included urinary tract infection\\u000a (UTI), UTI with septicemia, and urinary incontinence. Ten

S. Sen; S. Ahmed; M. Borghol

1997-01-01

308

Disappearance of vesicoureteric reflux during long-term prophylaxis of urinary tract infection in children  

Microsoft Academic Search

Seventy-five children aged 3 weeks to 12 years and found on investigation of symptomatic urinary infection to have vesicoureteric reflux were managed conservatively with continuous low-dose prophylaxis. Serial cystographic and renal growth studies were performed during seven to 15 years' follow-up. Reflux disappeared spontaneously in 53 children (71%) and from 79% of the affected ureters. This occurred at any age

D Edwards; I C Normand; N Prescod; J M Smellie

1977-01-01

309

Excretory System Activity  

NSDL National Science Digital Library

This activity from Darcy Hartley-Pinard will help elementary school teachers demonstrate the structures and process of the excretory system. The class will use a diagram of a human body and everyday items including straws, uncooked spaghetti, yarn and kidney beans to recreate the veins, arteries, kidneys, ureters, bladder and urethra. This activity is useful for younger students to visualize and connect with the processes that take place in their own bodies.

Hartley-Pinard, Darcy

2012-06-12

310

Creation of effective antireflux mechanism without creation of submucosal tunnel in surgical correction of vesicoureteric reflux: Myth or reality?-An experimental study  

PubMed Central

Objective: To evaluate the possibility of creating an effective antireflux mechanism without the need to create submucosal tunnel in surgical correction of vesicoureteric reflux. Materials and Methods: Ethical clearance was obtained from the institute ethical committee. The prospective experimental study was conducted on fresh postmortem specimens comprising of intact ureter-bladder-urethra of slaughtered lamb. Through perurethral tube, bladder distension revealed intact antireflux mechanism which disappeared following a cephalad slit of ureteric orifice. After intravesical advancement, mobilized ureters were anchored to the hiatus and the exposed detrusor along the proposed submucosal tunnel after stripping the bladder mucosa. Limited nonobstructed narrowing of the advanced ureteric ends was fashioned. After closure, bladder was distended and reflux was observed through proximal transected ureteric orifices with check cystogram. In second part of experiment, in a rectal reservoir, two intestinal segments as dilated ureters were implanted without creating submucosal tunnel, but anchoring the intrarectal segment to exposed submucosa. Intraluminal end of one segment was narrowed, while other left as such. Reservoir distension test was done to notice the status of reflux. In 24 months, 12 experiments were conducted. Results: In first part of experiment, successful antireflux mechanism was created in 11 ureters. In second part of experiment, reflux persisted in the ureteral segment implanted with obliquity but without distal nonobstructed narrowing, while there was no reflux in the ureteral segment with both obliquity and narrowing. Conclusion: Advancement and anchoring of the ureteral segment to the exposed detrusor with creation of nonobstructive and limited narrowing can create effective antireflux mechanism without the need to create submucosal tunnel. PMID:24604979

Gupta, Archika; Kureel, Shiv Narain

2014-01-01

311

Pharmacological profile of KUL-7211, a selective beta-adrenoceptor agonist, in isolated ureteral smooth muscle.  

PubMed

Since, in the human ureter, both beta(2)- and beta(3)-adrenoceptors mediate adrenergic-stimulation-induced relaxation, selective beta(2)-/beta(3)-adrenoceptor agonists might prove clinically useful for relieving ureteral colic and promoting stone passage. We evaluated the beta-adrenoceptor subtype selectivity and ureteral-relaxing efficacy of (-)-2-[4-(2-[[(1S,2R)-2-hydroxy-2-(4-hydroxyphenyl)-1-methylethyl]amin] ethyl)phenyloxy]acetic acid (KUL-7211), a new beta-adrenoceptor agonist, in vitro. In rat isolated organs, its selectivities, for inhibition of spontaneous uterine contraction (mediated via beta(2)-adrenergic stimulation) and inhibition of colonic contraction (via beta(3)-adrenergic stimulation) versus increase in atrial rate (via beta(1)-adrenergic stimulation), were 56.3 and 242.2, respectively. KUL-7211 relaxed 80-mM-KCl-induced tonic contractions in both rabbit (pD(2) value: 5.86 +/- 0.13, whose ureteral relaxation is mediated via beta(2)-adrenergic stimulation) and canine (pD(2) value: 6.52 +/- 0.16, via beta(3)-adrenergic stimulation) isolated ureters in a concentration-dependent manner. These KUL-7211-induced relaxing effects were antagonized by ICI-118,551 (selective beta(2)-adrenoceptor antagonist, pK(B) value: 8.91 +/- 0.24) in the rabbit ureter and by bupranolol (non-selective beta-adernoceptor antagonist, pK(B) value: 6.85 +/- 0.12) in the canine ureter. KUL-7211 also reduced the spontaneous rhythmic contraction in a canine ureteral spiral preparation in a concentration-dependent manner, the pD(2) value being 6.83 +/- 0.20. These data clearly demonstrate that KUL-7211 selectively stimulates both ureteral beta(2)- and beta(3)-adrenoceptors and potently relaxes ureteral smooth muscle. KUL-7211 may be a novel and useful medication for relieving ureteral colic and promoting stone passage in urolithiasis patients. PMID:12939526

Tomiyama, Yoshitaka; Murakami, Makoto; Hayakawa, Kohichi; Akiyama, Katsuyoshi; Yamazaki, Yoshinobu; Kojima, Masami; Shibata, Nobuo; Akahane, Masuo

2003-08-01

312

Prosthetic Sphincter Controls Urination  

NASA Technical Reports Server (NTRS)

People who lost muscular control of urinary canal through disease or injury aided by prosthetic sphincter. Implanted so it surrounds uretha, sphincter deflated and inflated at will by wearer to start and stop urina tion. Operating pressure adjusted after implantation to accommodate growth or atrophy of urinary canal and prevent tissue damage from excess pressure. Principle adapted to other organs, such as colon, ureter, or ileum.

Tenny, John B., Jr

1986-01-01

313

[Female with severe multiorgan damage and algetic myoma utery].  

PubMed

Painfull myoma utery in a patient with poor health condition and many disfunctional organs: Diabetes mellitus, Chronic renal insufficiency Gr. III (most probably a result of compression of the ureters causing bilateral hydronephrosis), arterial hypertony, anemia. The authors introduce their therapeutic model and manage to perform successfull operation after stabilizing the patient and intensive postoperative care. They point out the team work and good synchronization between the hospital divisions as crucial for the success of the treatment. PMID:22479898

Lazarov, N; Lazarov, L; Lazarov, S

2011-01-01

314

Management of renal nutcracker syndrome by retroperitoneal laparoscopic nephrectomy with ex vivo autograft repair and autotransplantation: a case report and review of the literature  

Microsoft Academic Search

INTRODUCTION: Nutcracker syndrome (NCS) is caused by a compression of the left renal vein between the aorta and the superior mesenteric artery (SMA). It results in left renal venous hypertension, and the subsequent development of venous varicosities of the renal pelvis, ureter, and gonadal vein. CASE PRESENTATION: A 21-year-old Chinese woman was admitted with a seven-month history of unilateral severe

Danfeng Xu; Yushan Liu; Yi Gao; Lei Zhang; Junkai Wang; Jiangping Che; Youhua Zhu

2009-01-01

315

Subjects: Trematoda and Trematode Diseases, Part 8: Supergenera and Genera T-Z  

E-print Network

, Charadrius alexandrinus , Larus ridibundus; k i d ? e ?; Kirgizia). - - Belopol' skaia, M. M., 1952c, 137(Phalaro- pus lobatus; ureters; Sem Ostrovov); 1954a, 22 (Charadrius dubius curonicus, Tringa glareola; Sudzukhinsk Preserve, Maritime Province...). ?Bykhovskaia,I.E. (Pavlovskaia), [1954b], 44-45, 101,102, 103, 105, 106,fig. 31 (Charadrius dubius, Vanellus vanellus, Numenius a r qu a t a, Limosa limosa, Tringa glareola, T. nebu- laria, T? stagnatilis, T. totanus, Larus ca- chinjnjans, L. minutus, L...

Doss, Mildred A.; Roach, Katharine F.; Farr, Marion M.; Breen, Virginia L.

1968-01-01

316

Deletion (11)(q14.1q21)  

SciTech Connect

The authors report on a 4-year-old girl with moderate development delay, horseshoe kidney, bilateral duplication of the ureters with right upper pole obstruction, hydronephrosis and nonfunction, and subsequent Wilms tumor of the right lower pole. She had an interstitial deletion of the long arm of chromosome 11 involving the region 11(q14.1q21). 22 refs., 2 figs., 1 tab.

Stratton, R.F.; Lazarus, K.H.; Ritchie, E.J.L. [Southwest Texas Methodist Hospital, San Antonio, TX (United States); Bell, A.M. [Nichols Institute, Los Angeles, CA (United States)

1994-02-01

317

Indications and Outcomes of Ureteroscopy for Urinary Stones  

Microsoft Academic Search

Since the earliest reports on ureteroscopic techniques by Marshall, Goodman, and Lyon et al., technologic advances and physician\\u000a innovation have dramatically expanded the diagnostic and therapeutic applications for ureteroscopy (1–3). Although uretero scopic techniques were initially limited to diagnostic evaluation of the distal ureter, the development\\u000a and ongoing refinement of semi-rigid and flexible ureteroscopes now make nearly all areas of

Matthew T. Gettman; Joseph W. Segura

318

Lithostar multiline.Initial clinical experience with a new multipurpose lithotripter  

Microsoft Academic Search

Summary  \\u000a After > 10 000 treatments – our HM3\\/4 and MPL 9000 have been replaced by the Siemens Lithostar multiline. As a ESWL center\\u000a with ESWL as the primary treatment indication for all types of stones in kidney and ureter we report our initial experience\\u000a with this new multifunctional lithotripter. The system consists of an electromagnetic shock-wave emitter (Focus 80

U. Haag; J. E. Gschwend; K. Kleinschmidt; R. E. Hautmann

1997-01-01

319

Extracorporeal Shock Wave Lithotripsy in 1 178 Ureteric Calculi Patients – Lessons Learnt  

Microsoft Academic Search

In the last 40 months 1,178 ureteric stone patients have been treated on the Siemens Lithostar. The commonest site was upper ureter (54%) followed by the lower (24%) and midureter (22%). Patients were stratified into two groups (A and B) chiefly on the basis of calculus size, degree of back pressure changes, presence of infection and associated local or systemic

Vipan Bhatia; Chandra Shekhar Biyani

1994-01-01

320

Diffuse Large B-Cell Lymphoma in an Adolescent Male Presenting as Ureteral Stricture  

PubMed Central

Lymphoma may affect the ureter in cases of retroperitoneal involvement. We present a case of an adolescent male found to have non-Hodgkin lymphoma initially presenting as ureteral stricture evident on imaging. He was treated and responded to multiagent chemotherapy with resolution of both the lymphoma and the ureteral stricture. Although rare, non-Hodgkin lymphoma should be included in the differential diagnosis of pediatric patients with noncalculous, idiopathic ureteral strictures. PMID:25093138

Jaeger, Christopher D.; McAlvany, Kelly L.; Zingula, Shannon N.; Kramer, Stephen A.; Granberg, Candace F.

2014-01-01

321

Ureteral metastasis of a prostatic adenocarcinoma  

PubMed Central

The ureter is a rare location of metastasis for any kind of primary tumour. The first case of truly ureteral metastasis was described by Stow in 1909. Regarding prostatic metastasis, the frequency is much lower with only 43 cases reported in the last century. We present a case of an exceedingly rare ureteral metastasis of a prostatic adenocarcinoma. In spite of its low incidence, it should be considered in patients with ureteral obstruction and concurrent prostatic adenocarcinoma.

Otta, Renan Javier; Gordillo, Carlos; Fernández, Inmaculada

2015-01-01

322

A case of calcified ureteritis cystica: an indiscernible condition from ureterolithiasis.  

PubMed

Ureteritis cystica is characterized by formation of multiple cysts in the wall of the renal pelvis or ureter. The clinical course is usually slow, but manifests if the cysts cause infection or obstruction. Stones are further complication to the disease. In this case study, we present a 39-year-old male originally referred with renal colic and misdiagnosed as ureterolithiasis due to the calcifiying cysts. PMID:19655701

Alicioglu, B; Kaplan, M; Aktoz, T; Atakan, I H

2009-01-01

323

Red blood cell gastrointestinal bleeding scintigraphy. Appearance of the left ovarian vein  

SciTech Connect

A case report is presented describing visualization of the left ovarian vein during technetium-99m labeled red blood cell (Tc-99m RBC) gastrointestinal scintigraphy. It demonstrates the usefulness of early dynamic images in differentiating the left ovarian vein from activity within the left ureter that may occur secondary to excretion of free technetium. The left ovarian vein may be visualized during Tc-99m RBC gastrointestinal scintigraphy and should not be mistaken for aberrant vasculature.

Camele, R.A.; Bansal, S.K.; Turbiner, E.H.

1984-05-01

324

miR200b Precursor Can Ameliorate Renal Tubulointerstitial Fibrosis  

Microsoft Academic Search

Members of the miR-200 family of micro RNAs (miRNAs) have been shown to inhibit epithelial-mesenchymal transition (EMT). EMT of tubular epithelial cells is the mechanism by which renal fibroblasts are generated. Here we show that miR-200 family members inhibit transforming growth factor-beta (TGF-beta)-induced EMT of tubular cells. Unilateral ureter obstruction (UUO) is a common model of EMT of tubular cells

Shigeyoshi Oba; Shintaro Kumano; Etsu Suzuki; Hiroaki Nishimatsu; Masao Takahashi; Hajime Takamori; Masatoshi Kasuya; Yousuke Ogawa; Kenichiro Sato; Kenjiro Kimura; Yukio Homma; Yasunobu Hirata; Toshiro Fujita; Vineet Gupta

2010-01-01

325

'Sting' procedure in the treatment of secondary reflux in children.  

PubMed

The authors present their experience (24 children) with the endoscopic subureteral injection of Teflon paste in the correction of secondary vesicoureteral reflux: reimplantation failure; ureterocele; obstructive bladder; exstrophy; postchemocystitis, and Hutch's diverticulum. Of these 24 cases (31 refluxing ureters), 18 were treated with success. Each cause justifies a comment on the particularities of its endoscopic treatment. The 'sting' can be particularly attractive to cure secondary reflux, avoiding the difficulties and complications of open surgical reimplantation. PMID:2364970

Aubert, D; Zoupanos, G; Destuynder, O; Hurez, F

1990-01-01

326

Acute Abdominal Pain as a Result of a Ruptured Hematosalpinx: A Rare Complication of an Unusual Müllerian Anomaly  

Microsoft Academic Search

Case ReportA 15-year-old virgin Caucasian female presented to the emergency room with a 40-hour history of acute left lower quadrant abdominal pain and nausea. Evaluation suggested a left pelvic kidney with obstructed ureter being the etiology. Her pain continued to escalate so further workup with laparoscopy was performed. This demonstrated a left pelvic sidewall hemi uterus with ruptured hematosalpinx. This

C. L. Diehl; L. P. Gavrilova-Jordan; C. C. Coddington

2009-01-01

327

Bilateral Uric Acid Nephrolithiasis and Ureteral Hypertrophy in a Free-ranging River Otter (Lontra canadensis)  

Microsoft Academic Search

We report the first case of uric acid nephrolithiasis in a free-ranging river otter (Lontra canadensis ). A7y r oldmale river otter collected from the Skagit River of western Washington (USA) had bilateral nephrolithiasis and severely enlarged ureters (one of 305 ex- amined (0.33%)). The uroliths were 97% uric acid and 3% protein. Microscopic changes in the kidney were confined

Robert A. Grove; Rob Bildfell; Charles J. Henny; Donald R. Buhler

2003-01-01

328

Excising multiple ureteral cysts endoscopically utilizing the OmniPlus-Max 80 W holmium laser.  

PubMed

We present a rare case of ureteral cysts in the left ureter treated by an endoscopic holmium laser. These cysts caused asymptomatic hydronephrosis in the left kidney. Complete cyst removal was performed by a ureteroscopically applied holmium laser. Six months post-procedure, the patient had no recurrence, which suggests that endoscopic excision is an optimal treatment for this disorder. Periodic ureteroscopic examination is indicated for further observation. PMID:25624968

Blewniewski, Mariusz; Ró?a?ski, Waldemar

2015-01-01

329

Bilateral uric acid nephrolithiasis and ureteral hypertrophy in a free-ranging river otter (Lontra canadensis)  

USGS Publications Warehouse

We report the first case of uric acid nephrolithiasis in a free-ranging river otter (Lontra canadensis). A 7 yr old male river otter collected from the Skagit River of western Washington (USA) had bilateral nephrolithiasis and severely enlarged ureters (one of 305 examined [0.33%]). The uroliths were 97% uric acid and 3% protein. Microscopic changes in the kidney were confined to expansion of renal calyces, minor loss of medullary tissue, and multifocal atrophy of the cortical tubules. No inflammation was observed in either kidney or the ureters. The ureters were enlarged due to marked hypertrophy of smooth muscle plus dilation of the lumen. Fusion of the major calyces into a single ureteral lumen was several cm distal to that of two adult male otters used as histopathologic control specimens. This case report is part of a large contaminant study of river otters collected from Oregon and Washington. It is important to understand diseases and lesions of the otter as part of our overall evaluation of this population.

Grove, Robert A.; Bildfell, Rob; Henny, Charles J.; Buhler, D.R.

2003-01-01

330

Ureteral stricture formation after ureteroscope treatment of impacted calculi: A prospective study  

PubMed Central

Purpose Urinary calculi is a familiar disease. A well-known complication of endourological treatment for impacted ureteral stones is the formation of ureteral strictures, which has been reported to occur in 14.2% to 24% of cases. Materials and Methods This was a prospective study. Ureterotripsy treatment was used on patients with impacted ureteral stones. Then, after 3 months and 6 months, the condition of these patients was assessed by means of a kidney-ureter-bladder (KUB) ultrasound. If the KUB ultrasound indicated moderate to serious hydronephrosis, the patient was further assessed by means of a computed tomography intravenous urogram or retrograde pyelogram to confirm the occurrence of ureteral strictures. Results Of the 77 patients who participated in the study, 5 developed ureteral strictures. Thus, the stricture rate was 7.8%. An analysis of the intraoperative risk factors including perforation of the ureter, damage to the mucous membrane, and residual stone impacted within the ureter mucosa revealed that none of these factors contributed significantly to the formation of the ureteric strictures. The stone-related risk factors that were taken into consideration were stone size, stone impaction site, and duration of impaction. These stone factors also did not contribute significantly to the formation of the ureteral strictures. Conclusions This prospective study failed to identify any predictable factors for ureteral stricture formation. It is proposed that all patients undergo a simple postoperative KUB ultrasound screening 3 months after undergoing endoscopic treatment for impacted ureteral stones. PMID:25598938

Singam, Praveen; Ho, Christopher Chee Kong; Sridharan, Radhika; Hod, Rozita; Bahadzor, Badrulhisham; Goh, Eng Hong; Tan, Guan Hee; Zainuddin, Zulkifli

2015-01-01

331

Ureteral fibroepithelial polyps with calculi: a case series  

PubMed Central

Introduction Fibroepithelial polyps of the ureter are benign tumors arising from the mesodermal tissue in the ureteral wall. Their etiology remains unknown. Hematuria and obstructive urinary symptoms are the most common findings. The treatment of choice is endoscopic resection, and the prognosis for patients with these lesions is excellent. Case presentation We present three cases of fibroepithelial polyps associated with calculi in the distal part of the ureter. The patients were all women, aged 20, 45 and 52 years. Two patients were suffering from flank pain and dysuria while one patient was asymptomatic at the time of diagnosis. The patients were fully treated with endoscopic resection. To the best of our knowledge, this is the fourth report of adult ureteral fibroepithelial polyps associated with ureteral calculi in the English literature. The etiology, clinical features, diagnosis, and management of fibroepithelial polyps are discussed in this report. Conclusion Whenever polypoid lesions are detected especially at the distal part of the ureter, benign fibroepithelial polyps should be kept in mind for differential diagnosis. Additionally, although rarely seen, the co-existence of ureteral calculi with fibroepithelial polyps should be borne in mind. PMID:18727819

Turunc, Tahsin; Kuzgunbay, Baris; Canpolat, Tuba

2008-01-01

332

Ureteropyeloscopy and homium: YAG laser lithotripsy for treatment of ureteral calculi (report of 356 cases)  

NASA Astrophysics Data System (ADS)

Objective: To evaluate the efficacy and safety of holmium YAG laser lithotripsy for the treatment of ureteral calculi. Methods: A total of 356 patients underwent ureteropyeloscopic lithotripsy using holmium YAG laser with a semirigid uretesopyeloscope, 93 upper, 135 middle, and 128 lower ureteral stones were treated. Results: The overall successful fragmentation rate for all ureteral stones in a single session achieved 98% (349/356). The successful fragmentation rate stratified by stone location was 95% 88/93 in the upper ureter, 99% (134/135) in the mid ureter , and 99%(127/128) in the distal ureter. 12 cases with bilateral ureteral stones which caused acute renal failure and anuria were treated rapidly and effectively by the holmium YAG laser lithotripsy. No complications such as perforation and severe trauma were encountered during the operations. 2 weeks 17months (with an average of 6.8 month ) follow up postoperatively revealed that the overall stone-free rate was 98%(343/349) and no ureteral stenosis was found. Conclusions Holmium YAG laser lithotripsy is a highly effective, minimally invasive and safe therapy for ureteral calculi. It is indicated as a first choice of treatment for patients with ureteral calculi, especially for the ones with mid- lower levels of ureteral calculi.

Wu, Zhong; Din, Qiang; Jiang, Hao-wen; Zen, Jing-cun; Yu, Jiang; Zhang, Yuanfang

2005-07-01

333

Treatment of Ureteroarterial Fistulae with Covered Vascular Endoprostheses and Ureteral Occlusion  

SciTech Connect

Background. Ureteroarterial fistulae (UAFs) are a rare entity, often difficult to identify, and associated with a high mortality rate. This fact has been attributed to a delay in diagnosis and treatment. Five conditions that can predispose to the development of this uncommon entity have been described: prior pelvic surgery, prolonged ureteral stenting, radiation therapy, previous vascular surgery and vascular pathology. Methods. We present 4 patients with UAFs and at least three of the above-mentioned conditions. Ureteral ischemia and subsequent necrosis promote the formation of these fistulae. The constant pulsation of the iliac artery is transmitted to an already compromised ureter containing a stiff intraluminal foreign body, resulting in pressure necrosis, most likely where the ureter crosses the iliac artery. Results and Conclusion. Cases were managed percutaneously with a combination of the deployment of a covered prosthesis and, when needed, with mechanical occlusion of the ureter. Hematuria stopped in all the patients with no evidence of immediate rebleeding. One patient presented a new episode of vaginal bleeding 13 months after endograft placement and ureteral embolization. Arteriography showed the presence of a hypogastric artery pseudoaneurysm that was occluded using coils. No new bleeding has occurred in this patient 12 months after the second embolization. At present all 4 patients are alive with follow-up periods of 5, 9, 11 and 25 months since the first procedure.

Bilbao, Jose I., E-mail: jibilbao@unav.es; Cosin, Octavio; Bastarrika, Gorka [Clinica Universitaria de Navarra, Universidad de Navarra, Department of Radiology (Spain); Rosell, David; Zudaire, Javier [Clinica Universitaria de Navarra, Universidad de Navarra, Department of Urology (Spain); Martinez-Cuesta, Antonio [Clinica Universitaria de Navarra, Universidad de Navarra, Department of Radiology (Spain)

2005-04-15

334

Primary non-refluxing megaureters.  

PubMed

Megaureters may be primary or secondary, and the dilatation may be due to obstruction or reflux, or both or neither. The cause of primary obstructed megaureter is the aperistaltic and narrowed pre-vesical portion of the ureter. The inner sheath of the terminal ureter generally shows a reduced amount of longitudinal smooth muscle bundles and an increased amount of collagen. Primary non-refluxing megaureters represent 23% of all prenatal diagnoses of hydronephrosis. They are more common in males and on the left side, and in 25% are bilateral. In older children they may become symptomatic. The diagnostic work up should include an ultrasound, a micturating cystourethrogram and an isotopic renogram. Most primary megaureters regress spontaneously or remain stable without compromising renal function, but 10-25% require surgery because of a progressive reduction in renal function or increasing dilatation, or because they become symptomatic. The basic principles of surgical repair include: resection of the obstructing segment, reduction in size of the dilated ureter, and re-implantation into the bladder using an anti-reflux technique. PMID:18947581

Merlini, E; Spina, P

2005-12-01

335

Endoscopic holmium laser treatment for ureterolithiasis  

PubMed Central

Introduction The rapid development and invention of ever more technologically advanced ureterorenoscopes as well as other instruments used in fragmenting ureteral stones have made the traditional surgical treatment of ureterolithiasis very rare. Material and methods We investigated 727 patients treated for ureterolithiasis. 769 ureteroscopic lithotripsies (URSL) with the holmium laser were performed. We evaluated the relation of the stone size, the section of the ureter involved, length of time of the stone within the ureter and the condition of the urinary tract to the results of the ureterolithiasis treatment. Results A good result of breaking up the stone and passing its fragments out of the ureter within 3 months following the first URSL was observed in 642 (90.9%) out of 706 patients. The remaining 64 (9.1%) patients required additional procedures: ESWL was performed on 44 patients; URSL was repeated for 20 patients. The most serious early post-URSL complications involved: urinary tract infection with symptoms of urosepsis in 10 patients, leading to death in 1 case, ureteral perforation in 3 patients, including 1 case presenting a periureteral leak that necessitated a surgical intervention. Conclusions URSL with the holmium laser is an effective and safe method for treating ureterolithiasis. PMID:24578918

Sosnowski, Marek

2012-01-01

336

Endoscopic Management of Vesicoureteral Reflux in Children in Kosova  

PubMed Central

Introduction: Vesicoureteral reflux (VUR) in children has been treated with subureteric deflux injection of Deflux (dextranomer hyaluronic acid copolymer) since 2009. The aim of this study was to analyze the results of endoscopic treatment of VUR in our clinic. Methods: Between March 2009 and December 2013, fifty-five children underwent endoscopic subureteral injection of Deflux in 78 ureters. Two months postoperatively voiding cystourethrogram (VCUG) was performed. This study examined the disappearance of VUR and urinary tract infection (UTI) as well as the quality of life during long-term follow-up. Results: The study included 55 patients (40 females and 15 males) with 78 refluxing ureters. There were 22 refluxed ureters altogether and 33 children had a unilateral reflux (two duplicated systems). All patients were treated, from the age 6 months up to 12 years old. The mean age of patients was 5.2 years. There has been no complications, but with few recurrences. In 6 patients (16.6%), endoscopic treatment with deflux was done twice, while in three patients (8.5%), the endoscopic treatment with deflux was performed three times, because of recurrence. Conclusion: We recommend the use of endoscopic Deflux injection as first line treatment for children with VUR. Endoscopic subureteral injection of Deflux is a minimally invasive method for VUR treatment in pediatric patients and is associated with low morbidity. PMID:25132708

Berisha, Murat; Hyseni, Nexhmi; Statovci, Sejdi; Grajqevci, Salih; Xhiha, Butrint

2014-01-01

337

Ureteroscopy and holmium:YAG laser lithotripsy: an emerging definitive management strategy for symptomatic ureteral calculi in pregnancy  

NASA Astrophysics Data System (ADS)

Objectives: Symptomatic urolithiasis in pregnancy that does not respond to conservative measures has traditionally been managed with ureteral stent insertion or percutaneous nephrostomy (PCN). Holmium:yttrium-aluminum-garnet (YAG) laser lithotripsy using state-of-the-art ureteroscopes represents an emerging strategy for definitive stone management in pregnancy. The purpose of this study was to review the results of holmium laser lithotripsy in a cohort of patients who presented with symptomatic urolithiasis in pregnancy. Methods: A retrospective analysis was conducted at 2 tertiary stone centers from January 1996 to August 2001 to identify pregnant patients who were treated with ureteroscopic holmium laser lithotripsy for symptomatic urolithiasis or encrusted stents. Eight patients with a total of 10 symptomatic ureteral calculi and 2 encrusted ureteral stents were treated. Mean gestational age at presentation was 22 weeks. Mean stone size was 8.1 mm. Stones were located in the proximal ureter/ureteropelvic junction (UPJ) (3), mid ureter (1), and distal ureter (6). Results: Complete stone fragmentation and/or removal of encrusted ureteral stents were achieved in all patients using the holmium:YAG laser. The overall procedural success rate was 91%. The overall stone-free rate was 89%. No obstetrical or urological complications were encountered. Conclusions: Ureteroscopy and holmium laser lithotripsy can be performed safely in all stages of pregnancy providing definitive management of symptomatic ureteral calculi. The procedure can be done with minimal or no fluoroscopy and avoids the undesirable features of stents or nephrostomy tubes.

Watterson, James D.; Girvan, Andrew R.; Beiko, Darren T.; Nott, Linda; Wollin, Timothy A.; Razvi, Hassan A.; Denstedt, John D.

2003-06-01

338

Spontaneous ureteric rupture secondary to an invasive desmoid tumour  

PubMed Central

INTRODUCTION Spontaneous ureteric rupture is a rare entity that presents as an extravasation of urine from the ureter without previous surgery, ureteric manipulation and external trauma of the ureter. We report the case of a desmoid tumour presenting as spontaneous ureteric rupture which was managed in our institution. PRESENTATION OF CASE A 28 years old healthy male presented with a four day history of generalised abdominal pain secondary to spontaneous right ureteric rupture. Patient was initially managed via insertion of nephrostomy tube and antibiotics. After unsuccessful attempts of retrograde and antegrade ureteric stent insertion, patient was subsequently managed via elective surgical intervention. The excised specimen revealed desmoid tumour as cause of the ureteric rupture. DISCUSSION Desmoid tumours are rare benign tumours arising from fascial or musculoaponeurotic structures that do not metastasise, but tend to invade locally. It is often initially managed medically prior to undertaking a definitive surgical intervention. To our knowledge this is the first reported case of ureteric perforation secondary to a desmoid tumour of the mesentery. CONCLUSION Spontaneous rupture of the ureter is often misdiagnosed as other conditions. History taking and examination can be unreliable, hence a high level of suspicion and further investigations should be utilised. Once the diagnosis is made, treatment can be individualised based on aetiology. PMID:25460442

Yoon, Peter Daechul; Ahmadi, Nariman; Strahan, Stephen; Wang, Audrey

2014-01-01

339

Possible Complications of Ureteroscopy in Modern Endourological Era: Two-Point or “Scabbard” Avulsion  

PubMed Central

Indication has led ureteroscopy to be a worldwide technique, with the expected appearance of multiple types of complications. Severe complications are possible including ureteral perforation or avulsion. Ureteral avulsion has been described as an upper urinary tract injury related to the action of blunt trauma, especially from traffic accidents, being the mechanism of injury, the result of an acute deceleration/acceleration movement. With the advent of endourology, that term is also applied to the extensive degloving injury resulting from a mechanism of stretching of the ureter that eventually breaks at the most weakened site, or ureteral avulsion is referred to as a discontinuation of the full thickness of the ureter. The paper presents a case report and literature review of the two-point or “scabbard” avulsion. The loss of long segment of the upper ureter, when end-to-end anastomosis is not technically feasible, presents a challenge to the urological surgeon. In the era of small calibre ureteroscopes these complications, due to growing incidence of renal stones will become more and more actual. Our message to other urologists is to know such a complication, to know the ways of treatment, and to analyse ureteroscopic signs, when to stop or pay attention. PMID:25610699

Gaizauskas, Sergejus; Zelvys, Arunas

2014-01-01

340

Matrix Metalloproteinases MMP2 and MMP9 Are Produced in Early Stages of Kidney Morphogenesis but Only MMP9 Is Required for Renal Organogenesis In Vitro  

PubMed Central

We analyzed matrix metalloproteinase (MMP) production by 11-d embryonic mouse kidneys and the effects of these enzymes on subsequent renal organogenesis. In vivo, immunolocalization of metalloproteinases by laser scanning confocal microscopy and zymograms of kidney lysates showed that the mesenchyme of embryonic kidneys synthesized both MMP9 and MMP2 enzymes. In vitro, embryonic kidneys also secreted both enzymes when cultured in a medium devoid of hormone, growth factor, and serum for 24 h during which T-shaped branching of the ureter bud appeared. We then evaluated the role of MMP2 and MMP9 in kidney morphogenesis by adding anti-MMP2 or anti-MMP9 IgGs to the culture medium of 11-d kidneys for 24 or 72 h. Although it inhibited activity of the mouse enzyme, anti-MMP2 IgGs had no effect on kidney morphogenesis. In contrast, anti-MMP9 IgGs with enzyme-blocking activity impaired renal morphogenesis, in a concentration-dependent manner, by inhibiting T-shaped branching and further divisions of the ureter bud. This effect was irreversible, still observed after inductive events and reproduced by exogenous tissue inhibitor of metalloproteinase 1 (TIMP1), the natural inhibitor of MMP9. These data provide the first demonstration of MMP9 and MMP2 production in vivo by 11-d embryonic kidneys and further show that MMP9 is required in vitro for branching morphogenesis of the ureter bud. PMID:9087449

Lelongt, Brigitte; Trugnan, Germain; Murphy, Gillian; Ronco, Pierre M.

1997-01-01

341

Critical role of cyclooxygenase-2 activation in pathogenesis of hydronephrosis caused by lactational exposure of mice to dioxin  

SciTech Connect

Congenital hydronephrosis is a serious disease occurring among infants and children. Besides the intrinsic genetic factors, in utero exposure to a xenobiotic, 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD), has been suggested to induce hydronephrosis in rodents owing to anatomical obstruction in the ureter. Here, we report that hydronephrosis induced in mouse pups exposed lactationally to TCDD is not associated with anatomical obstruction, but with abnormal alterations in the subepithelial mesenchyma of the ureter. In the kidneys of these pups, the expressions of a battery of inflammatory cytokines including monocyte chemoattractant protein (MCP)-1, tumor necrosis factor {alpha} (TNF{alpha}) and interleukin (IL) -1{beta} were up-regulated as early as postnatal day (PND) 7. The amounts of cyclooxygenase (COX) -2 mRNA and protein as well as prostaglandin E2 (PGE{sub 2}) were conspicuously up-regulated in an arylhydrocarbon-receptor-dependent manner in the TCDD-induced hydronephrotic kidney, with a subsequent down-regulation of the gene expressions of Na{sup +} and K{sup +} transporters, NKCC2 and ROMK. Daily administration of a COX-2 selective inhibitor to newborns until PND 7 completely abrogated the TCDD-induced PGE{sub 2} synthesis and gene expressions of inflammatory cytokines and electrolyte transporters, and eventually prevented the onset of hydronephrosis. These findings suggest an essential role of COX-2 in mediating the TCDD action of inducing hydronephrosis through the functional impairment rather than the anatomical blockade of the ureter.

Nishimura, Noriko [Research Center for Environmental Risk, National Institute for Environmental Studies, Tsukuba 305-8506 (Japan)], E-mail: nishimura.noriko@nies.go.jp; Matsumura, Fumio; Vogel, Christopher F.A. [Department of Environmental Toxicology and Center for Environmental Health Sciences, University of California, Davis, CA 95616 (United States); Nishimura, Hisao [Department of Human Sciences, Aichi Mizuho University, Toyota 470-0394 (Japan); Yonemoto, Junzo [Research Center for Environmental Risk, National Institute for Environmental Studies, Tsukuba 305-8506 (Japan); Yoshioka, Wataru [Laboratory of Environmental Health Sciences, Center for Disease Biology and Integrative Medicine, Graduate School of Medicine, The University of Tokyo, Tokyo 113-0033 (Japan); Tohyama, Chiharu [Research Center for Environmental Risk, National Institute for Environmental Studies, Tsukuba 305-8506 (Japan); Laboratory of Environmental Health Sciences, Center for Disease Biology and Integrative Medicine, Graduate School of Medicine, The University of Tokyo, Tokyo 113-0033 (Japan)], E-mail: mtohyama@mail.ecc.u-tokyo.ac.jp

2008-09-15

342

Construction of ureteral grafts by seeding urothelial cells and bone marrow mesenchymal stem cells into polycaprolactone-lecithin electrospun fibers.  

PubMed

The aim of the present study was to investigated the construction of polycaprolactone-lecithin (PCL-L) electrospun fibers as a novel scaffold material for a tissue-engineered ureter. The effect of bone marrow mesenchymal stem cells (BM-MSCs) on the neovascularization of the scaffolds and the viability of planted urothelial cells (UCs) on PCL-L were also studied. UCs were obtained from New Zealand rabbit bladders, cultured and then seeded onto the lumen of the tubular scaffolds before being subcutaneously transplanted into the space of nude mice. The cultured UCs showed vacuolar degeneration after 7 days of transplantation and they gradually degraded thereafter. To facilitate the regeneration of the tissue-engineered ureter and the survival of UCs in the implant, MSCs were seeded into the tubular grafts by rolling up the nanofibrous membrane, followed by the seeding of UCs. This facilitated the survival of the UCs, which formed several cellular layers after 30 days. The mean microvessel density was significantly increased in tissues seeded with MSCs. Cell-tracking experiments revealed that the transplanted MSCs did not integrate directly into capillaries for angiogenesis. Our results demonstrated that the PCL-L electrospun fibrous scaffold has a high potential for a tissue-engineered ureter especially when seeded with BM-MSCs, which enhanced angiogenesis. PMID:20383857

Shen, Jie; Fu, Xiaoling; Ou, Lailiang; Zhang, Min; Guan, Yong; Wang, Kai; Che, Yongzhe; Kong, Deling; Steinhof, Gustav; Li, Wenzhong; Yu, Yaoting; Ma, Nan

2010-03-01

343

Location of the ureteral openings in the cloacas of tinamous, some ratite birds, and crocodilians: a primitive character.  

PubMed

Cloacas of 67 avian species, of both sexes, from various habitats and differing dietary habits, were examined macro- and microscopically to investigate possible variation in the location of the ureteral openings. Differing from most birds studied, in adult male Rhea americana and several tinamous species the ureters were found to open into the coprodeum. In these species the urodeum receives only the vas deferens or oviduct. Similarly, in crocodiles Caiman crocodilus yacare, but not in lizards Tropidurus montanus and snakes Crotalus durissus terrificus, the ureters empty into the coprodeum. This similarity between ancient birds (ratites and tinamous) and crocodiles may indicate a primitive character linking reptiles and birds. This unusual position of the ureteral orifice can represent an adaptation to facilitate urine collection into the coprodeum and large intestine. Another possibility is that this variation in ureter position is a male reproductive strategy to avoid the mixture of urine and semen in the cloaca. There were no evident correlations between the location of the ureteral openings and the birds' habitat, diet, or histology of the coprodeal mucosa. The occurrence of a phallus in eight species of birds was detected, as well as a peculiar vascularization related to the coprodeal epithelium of anseriformes. Together, these data add to the scarce information about the morphophysiology of the avian cloaca, and also contribute to clarify avian phylogenetic linkages. PMID:15108162

Oliveira, Cleida Aparecida; Silva, Renata Mageste; Santos, Marcileida Maria; Mahecha, Germán Arturo Bohórquez

2004-05-01

344

Bilateral uric acid nephrolithiasis and ureteral hypertrophy in a free-ranging river otter (Lontra canadensis).  

PubMed

We report the first case of uric acid nephrolithiasis in a free-ranging river otter (Lontra canadensis). A 7 yr old male river otter collected from the Skagit River of western Washington (USA) had bilateral nephrolithiasis and severely enlarged ureters (one of 305 examined [0.33%]). The uroliths were 97% uric acid and 3% protein. Microscopic changes in the kidney were confined to expansion of renal calyces, minor loss of medullary tissue, and multifocal atrophy of the cortical tubules. No inflammation was observed in either kidney or the ureters. The ureters were enlarged due to marked hypertrophy of smooth muscle plus dilation of the lumen. Fusion of the major calyces into a single ureteral lumen was several cm distal to that of two adult male otters used as histopathologic control specimens. This case report is part of a large contaminant study of river otters collected from Oregon and Washington. It is important to understand diseases and lesions of the otter as part of our overall evaluation of this population. PMID:14733290

Grove, Robert A; Bildfell, Rob; Henny, Charles J; Buhler, Donald R

2003-10-01

345

Ureteral Reconstruction With Bowel Segments: Experience With Eight Patients in a Single Institute  

PubMed Central

Purpose Although replacement of the ureter with a bowel segment is indicated for large ureteral defects, it is still a challenging technique for urologists. We present our experience and outcome of ureteral reconstruction using bowel segments. Materials and Methods Ureteral reconstruction with bowel segments was performed in eight patients in our institute between 1969 and 2009. We investigated the position and length of the ureteral defect and methods of reconstruction as well as the patients' backgrounds, postoperative complications, and clinical outcomes. Results Five patients underwent ureteral replacement with isolated ileal segments alone. In one patient, the ureter was reconstructed by using the Yang-Monti procedure with the ileum. A colon segment was used in two patients who required bladder augmentation for tuberculous contracted bladder at the same time. Metabolic acidosis occurred in three patients having a solitary kidney and the ureter had to be replaced by a relatively long intestinal segment. Two patients who received preoperative radiation therapy were required to undergo additional operations. Long-term cancer-free survival was achieved in one patient who underwent ileal substitution for low-grade renal pelvic cancer. Conclusions Although ureteral replacement with a bowel segment is a challenging and useful procedure, attention must be paid to the possibility of metabolic acidosis, which is likely to occur in patients having a solitary kidney with renal insufficiency or in patients requiring a long intestinal segment for reconstruction. In addition, preoperative radiation therapy for the pelvic organs may cause postoperative complications. PMID:25405017

Takeuchi, Motoi; Tsukamoto, Taiji

2014-01-01

346

Lower urinary tract development and disease  

PubMed Central

Congenital Anomalies of the Lower Urinary Tract (CALUT) are a family of birth defects of the ureter, the bladder and the urethra. CALUT includes ureteral anomalies such as congenital abnormalities of the ureteropelvic junction (UPJ) and ureterovesical junction (UVJ), and birth defects of the bladder and the urethra such as bladder-exstrophy-epispadias complex (BEEC), prune belly syndrome (PBS), and posterior urethral valves (PUV). CALUT is one of the most common birth defects and is often associated with antenatal hydronephrosis, vesicoureteral reflux (VUR), urinary tract obstruction, urinary tract infections (UTI), chronic kidney disease and renal failure in children. Here, we discuss the current genetic and molecular knowledge about lower urinary tract development and genetic basis of CALUT in both human and mouse models. We provide an overview of the developmental processes leading to the formation of the ureter, bladder, and urethra, and different genes and signaling pathways controlling these developmental processes. Human genetic disorders that affect the ureter, bladder and urethra and associated gene mutations are also presented. As we are entering the post-genomic era of personalized medicine, information in this article may provide useful interpretation for the genetic and genomic test results collected from patients with lower urinary tract birth defects. With evidence-based interpretations, clinicians may provide more effective personalized therapies to patients and genetic counseling for their families. PMID:23408557

Rasouly, Hila Milo; Lu, Weining

2013-01-01

347

Family Caregiver Palliative Care Intervention in Supporting Caregivers of Patients With Stage II-IV Gastrointestinal, Gynecologic, and Urologic Cancers  

ClinicalTrials.gov

Healthy, no Evidence of Disease; Localized Transitional Cell Cancer of the Renal Pelvis and Ureter; Metastatic Transitional Cell Cancer of the Renal Pelvis and Ureter; Psychosocial Effects of Cancer and Its Treatment; Recurrent Bladder Cancer; Recurrent Cervical Cancer; Recurrent Colon Cancer; Recurrent Gastric Cancer; Recurrent Ovarian Epithelial Cancer; Recurrent Ovarian Germ Cell Tumor; Recurrent Pancreatic Cancer; Recurrent Rectal Cancer; Recurrent Renal Cell Cancer; Recurrent Transitional Cell Cancer of the Renal Pelvis and Ureter; Recurrent Urethral Cancer; Recurrent Uterine Sarcoma; Regional Transitional Cell Cancer of the Renal Pelvis and Ureter; Stage II Bladder Cancer; Stage II Renal Cell Cancer; Stage II Urethral Cancer; Stage IIA Cervical Cancer; Stage IIA Colon Cancer; Stage IIA Gastric Cancer; Stage IIA Ovarian Epithelial Cancer; Stage IIA Ovarian Germ Cell Tumor; Stage IIA Pancreatic Cancer; Stage IIA Rectal Cancer; Stage IIA Uterine Sarcoma; Stage IIB Cervical Cancer; Stage IIB Colon Cancer; Stage IIB Gastric Cancer; Stage IIB Ovarian Epithelial Cancer; Stage IIB Ovarian Germ Cell Tumor; Stage IIB Pancreatic Cancer; Stage IIB Rectal Cancer; Stage IIB Uterine Sarcoma; Stage IIC Colon Cancer; Stage IIC Ovarian Epithelial Cancer; Stage IIC Ovarian Germ Cell Tumor; Stage IIC Rectal Cancer; Stage III Bladder Cancer; Stage III Pancreatic Cancer; Stage III Renal Cell Cancer; Stage III Urethral Cancer; Stage IIIA Cervical Cancer; Stage IIIA Colon Cancer; Stage IIIA Gastric Cancer; Stage IIIA Ovarian Epithelial Cancer; Stage IIIA Ovarian Germ Cell Tumor; Stage IIIA Rectal Cancer; Stage IIIA Uterine Sarcoma; Stage IIIB Cervical Cancer; Stage IIIB Colon Cancer; Stage IIIB Gastric Cancer; Stage IIIB Ovarian Epithelial Cancer; Stage IIIB Ovarian Germ Cell Tumor; Stage IIIB Rectal Cancer; Stage IIIB Uterine Sarcoma; Stage IIIC Colon Cancer; Stage IIIC Gastric Cancer; Stage IIIC Ovarian Epithelial Cancer; Stage IIIC Ovarian Germ Cell Tumor; Stage IIIC Rectal Cancer; Stage IIIC Uterine Sarcoma; Stage IV Bladder Cancer; Stage IV Gastric Cancer; Stage IV Ovarian Epithelial Cancer; Stage IV Ovarian Germ Cell Tumor; Stage IV Pancreatic Cancer; Stage IV Renal Cell Cancer; Stage IV Urethral Cancer; Stage IVA Cervical Cancer; Stage IVA Colon Cancer; Stage IVA Rectal Cancer; Stage IVA Uterine Sarcoma; Stage IVB Cervical Cancer; Stage IVB Colon Cancer; Stage IVB Rectal Cancer; Stage IVB Uterine Sarcoma; Ureter Cancer

2014-11-19

348

The Characteristics of Recurrent Upper Tract Urothelial Carcinoma after Radical Nephroureterectomy without Bladder Cuff Excision  

PubMed Central

Purpose To investigate oncological outcomes based on bladder cuff excision (BCE) during radical nephroureterectomy (RNU) for upper tract urothelial carcinoma (UTUC) and to provide clinical evidence of tumor recurrence in patients without BCE. Materials and Methods We retrospectively collected data of 372 consecutive patients who underwent RNU at our institution from May 1989 through October 2010. After excluding some data, we reviewed 336 patients for the analysis. Results Of the patients who underwent RNU with BCE (n=279, 83.0%) and without BCE (n=57, 17.0%), patients without BCE had poorer cancer-specific and overall survival rates. Among 57 patients without BCE, 35 (61.4%) experienced tumor recurrence. Recurrence at the remnant ureter resulted in poor oncological outcomes compared to those in patients with bladder recurrence, but better outcomes were observed compared to recurrence at other sites. No significant predictors for tumor recurrence at the remnant ureter were identified. In patients without BCE, pathological T stage [hazard ratio (HR), 5.73] and lymphovascular invasion (HR, 3.65) were independent predictors of cancer-specific survival, whereas age (HR, 1.04), pathological T stage (HR, 5.11), and positive tumor margin (HR, 6.50) were independent predictors of overall survival. Conclusion Patients without BCE had poorer overall and cancer-specific survival after RNU than those with BCE. Most of these patients experienced tumor recurrence at the remnant ureter and other sites. Patients with non-organ confined UTUC after RNU without BCE may be considered for adjuvant chemotherapy with careful follow-up. PMID:25683984

Kang, Minyong; Jeong, Chang Wook; Kwak, Cheol; Kim, Hyeon Hoe

2015-01-01

349

Retroperitoneal teratoma with somatic malignant transformation: A papillary renal cell carcinoma in a testicular germ cell tumour metastasis following platinum-based chemotherapy  

PubMed Central

Background Malignant transformation describes the phenomenon in which a somatic component of a germ cell teratoma undergoes malignant differentiation. A variety of different types of sarcoma and carcinoma, all non-germ cell, have been described as a result of malignant transformation. Case presentation A 33-year-old man presented with a left testicular mass and elevated tumour markers. Staging investigations revealed retroperitoneal lymphadenopathy with obstruction of the left ureter and distant metastases. Histopathology from the left radical orchiectomy showed a mixed germ cell tumour (Stage III, poor prognosis). The ureter was stented and four cycles of cisplatin, etoposide and bleomycin chemotherapy administered. After initial remission, the patient recurred four years later with a large retroperitoneal mass involving the renal vessels and the left ureter. Left retroperitoneal lymph node dissection with en-bloc resection of the left kidney was performed. Histopathology revealed a germ cell tumour metastasis consisting mainly of mature teratoma. Additionally, within the teratoma a papillary renal cell carcinoma was found. The diagnosis was supported by immunohistochemistry showing positivity for AMACR, CD10 and focal expression of RCC and CK7. There was no radiological or histo-pathological evidence of a primary renal cell cancer. Conclusions To the best of our knowledge, malignant transformation into a papillary renal cell carcinoma has not been reported in a testicular germ cell tumour metastasis following platinum-based chemotherapy. This histological diagnosis might have implications for potential future therapies. In the case of disease recurrence, renal cell cancer as origin of the recurrent tumour has to be excluded because renal cell carcinoma metastases would not respond well to the classical germ cell tumour chemotherapy regimens. PMID:23402579

2013-01-01

350

Clinical Outcomes and Long-Term Resolution in Patients with Persistent Vesicoureteral Reflux after Open Ureteral Reimplantation  

PubMed Central

Purpose Success rates of ureteral reimplantation for primary vesicoureteral reflux (VUR) are high. Few studies document the natural history of children with persistent VUR. We reviewed their clinical outcomes and long-term resolution. Materials and Methods We performed a retrospective review of all children with persistent VUR (grade?1) into the reimplanted ureter(s) on initial cystogram after reimplantation for primary VUR at our institution from January 1990 - December 2002. We evaluated subsequent cystograms (graded on the 3-point radionuclide cystogram scale), surgery, and urinary tract infection (UTI). We performed survival analyses of time to resolution of persistent (grade?1) and clinically significant (grade?2) VUR in patients with >1 postoperative cystogram. Results Of 965 patients, 59 (94 ureters) had persistent VUR (6.1%): 19 grade 1/3, 29 grade 2/3 and 11 grade 3/3. Median age at reimplantation was 1.9 years; 62.7% were female. Preoperative VUR grade was 2/3 in 42.4% and 3/3 in 57.6%; 30.5% had ureteral tapering. Median follow-up was 47.1 months (IQR 19.3–65.3). 26/36 (72.2%) patients resolved; median time to resolution was 20.4 months. 21/32 with grade ? 2 on postoperative cystogram (65.6%) resolved; median time to resolution was 20.4 months. 10 had persistent VUR at last cystogram; grade 1 or 2 in 9 patients and 3/3 in 1 patient. One had repeat reimplantation for persistent VUR. 7 patients (13%) had postoperative febrile UTI at a median of 37 months postoperatively (IQR 1.7–64.4). Conclusions Persistent VUR after reimplantation resolves spontaneously in most children and can be managed non-operatively with good long-term outcomes. PMID:22906647

Hubert, Katherine C.; Kokorowski, Paul J.; Huang, Lin; Prasad, Michaella M.; Rosoklija, Ilina; Retik, Alan B.; Nelson, Caleb P.

2013-01-01

351

The outcome of kidney transplants with multiple renal arteries.  

PubMed

The use of grafts with multiple renal arteries has been considered a relative contraindication because of the increased incidence of vascular and urologic complications. The aim of this retrospective study is to determine whether the kidney grafts with multiple arteries have any adverse effect upon post transplant graft and patient survival. After reviewing the records of 35 adult kidney transplants done consecutively at Bangabandhu Sheik Mujib Medical University over a period of 3 years (Jan 2005 to Dec 2007). Mean age of recipients. 43.46±12.11 years and donors 40.33±11.46 years. Twenty patients (Group A) had grafts with single renal artery and 15 patients (Group B) had grafts with multiple renal arteries. The incidence of vascular complications, ureteral complications, post surgical haemorrhage, mean serum creatinine level and acute tubular necrosis in both Group A & B were observed. Complications developed in 15(43%) patients in this series. In Group A, 1(5%) developed post operative bleeding cause perinephric hematoma, 1(5%) technical obstruction of ureter, 1(5%) sloughed ureter, graft nephrectomy 1(5%) and acute tubular necrosis 1(5%) patient. In Group B, 2(13%) patients developed hematoma, urine leak 3(20%), sloughed ureter 1(6%), graft nephrectomy 1(6%) and acute tubular necrosis 3(20%) patients. Though the kidney grafts with multiple renal arteries have been considered a relative contraindication because of the increased risk of complication. In this series incidence of complication was 43%. The higher rate probably reflects the small number of living related donors. PMID:21240169

Khanam, A; Alam, M R; Ahmed, A H; Khan, S A

2011-01-01

352

[Pregnancy and lithiasis of the upper urinary tract. Clinical aspects and therapeutic management].  

PubMed

Upper urinary tract calculi can be difficult to diagnose and to treat. One has to be aware that there is a risk for the mother which is often not recognized in the long term. The authors describe 17 cases of pregnant women aged between 20 and 33 who were treated for calculi in the Urological Service in Poitiers. They were diagnosed at different stages of pregnancy and a few had a previous urological history. The women presented in different ways, several of them with urinary colic and 10 with urinary colic and fever. Urinary tract infection and septicaemia also occurred. Six patients passed the stones spontaneously. The rest had to be treated by some form of operation, either during the pregnancy or afterwards, including one case of a patient who had to have her kidney and ureter removed and another who had to have a kidney removed. One patient had to have an emergency caesarean section for fetal distress although she had had stone removed at the 20th week of pregnancy. It is not possible to know from this series the incidence of stones in the tract. Various theories of the formation of the stones, including the anatomical changes that occur in the urinary tract in pregnancy, are suggested and these include the hormonal theory of dilatation of the ureters as well as the mechanical theory of changes in the course of the ureters. There are also likely to be changes in the phosphocalcium metabolism. Pain in the lumbar and lower abdominal region is the most frequent symptom occurring in 90-100% of cases and urinary tract infection is common.(ABSTRACT TRUNCATED AT 250 WORDS) PMID:4008892

Aubert, J; Doré, B; Moreau, P; Giraud, J R

1985-01-01

353

Pure Laparoscopic and Robot-Assisted Laparoscopic Reconstructive Surgery in Congenital Megaureter: A Single Institution Experience  

PubMed Central

To report our experience of pure laparoscopic and robot-assisted laparoscopic reconstructive surgery in congenital megaureter, seven patients (one bilateral) with symptomatic congenital megaureter underwent pure laparoscopic or robot-assisted laparoscopic surgery. The megaureter was exposed at the level of the blood vessel and was isolated to the bladder narrow area. Extreme ureter trim and submucosal tunnel encapsulation or papillary implantations and anti-reflux ureter bladder anastomosis were performed intraperitoneally by pure laparoscopic or robot-assisted laparoscopic surgery. The clinical data of seven patients after operation were analyzed, including the operation time, intraoperative complications, intraoperative bleeding volumes, postoperative complications, postoperative hospitalization time and pathological results. All of the patients were followed. The operation was successfully performed in seven patients. The mean operation times for pure laparoscopic surgery and robotic-assistant laparoscopic surgery were 175 (range: 150–220) and 187 (range: 170–205) min, respectively, and the mean operative blood loss volumes were 20 (range: 10–30) and 28.75 (range: 15–20) ml, respectively. There were no intraoperative complications. The postoperative drainage time was 5 (range: 4–6) and 5.75 (range: 5–6) d, respectively, and the indwelling catheter time was 6.33 (range: 4–8) d and 7 (range: 7–7) d, respectively. The postoperative hospitalization time was 7.67 (range: 7–8) d and 8 (range: 7–10) d, respectively. There was no obvious pain, no secondary bleeding and no urine leakage after the operation. Postoperative pathology reports revealed chronic urothelial mucosa inflammation. The follow-up results confirmed that all patients were relieved of their symptoms. Both pure laparoscopic and robot-assisted laparoscopic surgery using different anti-reflux ureter bladder anastomoses are safe and effective approaches in the minimally invasive treatment of congenital megaureter. PMID:24924420

Zhang, Peng; Gao, Jiangping; Dong, Jun; Chen, Guangfu; Xu, Axiang; Ma, Xin; Li, Hongzhao; Shi, Lixin

2014-01-01

354

Safety and effectiveness of Lithostar shock tube C in the treatment of urinary calculi.  

PubMed

Over 14 years of clinical use of extracorporeal shockwave lithotripsy (SWL), great technical modifications resulted in the development of many second-generation lipthotripters. The Siemens Lithostar machine, with its standard shockwave tube, was introduced in 1986. The objective of this study was to assess the safety and effectiveness of the newly proposed Lithostar shock tube C in the treatment of urinary calculi. Between July 1992 and August 1993, 319 patients (214 males and 105 females, average 49.7 years) with 433 renal or ureteral stones or both were treated at five centers in Canada and the United States. Most of the stones (72%) were located in the kidneys, while 28% were located in the ureters. Most (81%) of the treated sides (side = kidney and ureter) presented with single stones, 11% presented with two stones, and 8% presented with three or more stones. The average stone burden was 13.6 mm. The average duration of treatment for the whole population of patients was 39.3 minutes using an average number of shockwaves of 3633 in a minimum and maximum energy setting of 0.11 and 3.82, respectively. The majority of treatments (92%) were performed without anesthesia. Fragmentation was achieved in 93.5% of treatments, with a 3-month stone-free rate of 62.5% and a success rate (stone free or fragment < 5 mm) of 72%. Auxiliary procedures were necessary in conjunction with 108 treatments, and most of them were in form of catheter/stent placement. Treatment applied on a separate occasion to different stones but in the same collecting system (either a kidney or a ureter) were considered retreatments.(ABSTRACT TRUNCATED AT 250 WORDS) PMID:7550263

Elabbady, A; Mathes, G; Morehouse, D D; Honey, J; Pahira, J; Zeman, R; Paquin, J M; Faucher, R; Elhilali, M M

1995-06-01

355

Management of impacted proximal ureteral stone: Extracorporeal shock wave lithotripsy versus ureteroscopy with holmium: YAG laser lithotripsy  

PubMed Central

Objective: Prospective evaluation of the efficacy and safety of the extracorporeal shock wave lithotripsy (SWL) and ureteroscopy with Holmium: YAG laser lithotripsy (URSL) as a primary treatment for impacted stone in the proximal ureter. Patients and Methods: A total of 82 patients with a single impacted stone in the proximal ureter were included in the study. Patients were allocated into two groups according to patient preference for either procedure. The first group included 37 patients who were treated by SWL and the second group included 45 patients treated by URSL. The preoperative data and treatment outcomes of both procedures were compared and analyzed. Results: There was no difference as regards to patient and stone characters between the two groups. There was significantly higher mean session number and re-treatment rate in the SWL group in comparison to URSL group (1.5 ± 0.8 vs. 1.02 ± 0.15 session, and 43.2% vs. 2.2%, respectively). At one month, the stone-free rate of the URSL group was statistically significantly higher than that of the SWL group (80% vs. 67.6%, respectively). The stone-free rate at three months was still higher in the URSL group, but without statistically significant difference (80.2% vs. 78.4%, respectively). There was no statistically significant difference in the rate of complications between the SWL and URSL (24.3% vs. 15.6%, respectively). Conclusion: Both procedures can be used effectively and safely as a primary treatment for impacted stone in the proximal ureter; however, the URSL has a significantly higher initial stone-free rate and lower re-treatment rate. PMID:23798864

Khalil, Mostafa

2013-01-01

356

Late effects of intraoperative radiation therapy on retroperitoneal tissues, intestine, and bile duct in a large animal model  

SciTech Connect

The late histopathological effects of intraoperative radiotherapy (IORT) on retroperitoneal tissues, intestine, and bile duct were investigated in dogs. Fourteen adult foxhounds were subjected to laparotomy and varying doses (0-45 Gy) of IORT (11 MeV electrons) delivered to retroperitoneal tissues including the great vessels and ureters, to a loop of defunctionalized small bowel, or to the extrahepatic bile duct. One control animal received an aortic transection and reanastomosis at the time of laparotomy; another control received laparotomy alone. This paper describes the late effects of single-fraction IORT occurring 3-5 years following treatment. Dogs receiving IORT to the retroperitoneum through a 4 X 15 cm portal showed few gross or histologic abnormalities at 20 Gy. At doses ranging from 30-45 Gy, radiation changes in normal tissues were consistently observed. Retroperitoneal fibrosis with encasement of the ureters and great vessels developed at doses {ge}30 Gy. Radiation changes were present in the aorta and vena cava at doses {ge}40 Gy. A 30 Gy dog developed an in-field malignant osteosarcoma at 3 years which invaded the vertebral column and compressed the spinal cord. A 40 Gy animal developed obstruction of the right ureter with fatal septic hydronephrosis at 4 years. Animals receiving IORT through a 5 cm IORT portal to an upper abdominal field which included a defunctionalized loop of small bowel, showed few gross or histologic abnormalities at a dose of 20 Gy. At 30 Gy, hyaline degeneration of the intestinal muscularis layer of the bowel occurred. At a dose of 45 Gy, internal intestinal fistulae developed. One 30 Gy animal developed right ureteral obstruction and hydronephrosis at 5 years. A dog receiving 30 Gy IORT through a 5 cm portal to the extrahepatic bile duct showed diffuse fibrosis through the gastroduodenal ligament. These canine studies contribute to the area of late tissue tolerance to IORT. 7 refs., 3 figs., 5 tabs.

Sindelar, W.F.; Tepper, J.E.; Kinslla, T.J.; Barnes, M.; DeLuca, A.M.; Terrill, R.; Matthews, D.; Johnstone, P.A.S. [National Institutes of Health, Bethesda, MD (United States); Anderson, W.J. [Terre Haute Center for Medical Education, IN (United States); Bollinger, B.K. [National Naval Medical Center, Bethesda, MD (United States)

1994-07-01

357

Intramuscular nerve distribution in bladder and the relationship between intramuscular ganglia and bladder function in man and dog  

PubMed Central

In clinical, the relationship between bladder intramuscular nerve and function is also elusive. This study aims to compare the bladder intramuscular nerve distribution and its characteristics and significance in human and dog. Eleven dogs’ bladders were stained by Sihler’s and HE techniques. Fifteen human bladders were adopted by Sihler’s staining, using 10% formaldehyde to fix 12 weeks, 7 by HE dyeing fixes 24 hours. Results indicated that man’s bladder was triangularpyramid-shaped. While dog’s bladder was spherical-shaped and its muscle fibers arrange were irregularly shaped. Longitudinal muscle of the outer layer is fleshy, the terminal is at the bladder neck without exception, and vesical trigone has relatively obvious three layers of structure. After dyeing dog’s bladder was transparent jelly, the nerve was purple color, enter bladder at the ureter-bladder junction with different forms. Man’s bladder nerves, no ganglion, were more trivial than that of dogs, and with smaller branches, the large nerve ganglion. The links with the nerve fibers and forms the network on the dog’s bladder wall, and the nerve fibers crosses comparatively little on both the left and right sides in the midline. The right nerve branch gains advantage on the man’s bladder wall, the situations is opposite on the dog’s. In conclusion, bladder nerves which scatter to the bladder wall have branches to lower ureter at the ureter-bladder junction, the structure and distribution of intramuscular nerves are different, the existence of intramuscular ganglia is relating to the bladder function both in man and dog. PMID:25664008

Zhao, Zeju; Xu, Qian; Lu, Li; Luo, Xu; Fu, Xiaoyun

2014-01-01

358

Evaluation of Extracorporeal Shock Wave Lithotripsy (ESWL): Efficacy in Treatment of Urinary System Stones  

PubMed Central

ABSTRACT Introduction: Elimination of stone is determined by size and its localization. Stone from the ureter in 80% of cases can be eliminated spontaneously. If the stone by its characteristics is not spontaneously eliminated, taken are further steps and therapeutic protocols to solve this problem. Material and methods: The study was prospective, open and comparative. It was conducted at the Urology Clinic Clinical Center of Sarajevo University in the period from 2007 to 2013. The study included 404 patients with urinary tract lithiasis treated by ESWL. ESWL treatment is performed on the machine Siemens Model Lithostar Multiline, which has a combined ultrasonographic and fluoroscopic display, large energy density in order to obtain optimum focus (without damaging surrounding tissue) and minimal pain that on rare occasions requires for mild sedation-sedation. Results: From a total of 404 patients included in the study there were 234 (57.92%) male and 170 (42.08%) female patients. The most common type of stone both in female and male patients was calcium type. From a total of 262 calcium stones, 105 of them (40.07%) was present in female patients and 157 (59.92%) in male. Share of infectious type of stone in female patients was 63 (49.60%) and 64 among males (50.39%). Other stones were less abundant in both the gender groups and their total number was only 17. In women their frequency was 2 (13.33%) and 13 among males (86.67%). There was a significant difference in the frequency of different types of stones by gender (x2 = 11.47, p = 0.009). Conclusion: There was no statistically significant correlation between the number of treatments and localization of stones in the ureter, as well as a statistically significant correlation between the size of the stone and the localization of calculus in the ureter. PMID:25568579

Junuzovic, Dzelaludin; Prstojevic, Jelena Kovacevic; Hasanbegovic, Munira; Lepara, Zahid

2014-01-01

359

Characteristics of Calculi in the Urinary Tract  

PubMed Central

Introduction: Elimination of stone is determined by size and its localization. Stone from the ureter in 80% of cases can be eliminated spontaneously. If the stone by its characteristics is not spontaneously eliminated, taken are further steps and therapeutic protocols to solve this problem. Material and methods: The study was prospective, open and comparative. It was conducted at the Urology Clinic Clinical Center of Sarajevo University in the period from 2007 to 2013. The study included 404 patients with urinary tract lithiasis treated by ESWL. ESWL treatment is performed on the machine Siemens Model Lithostar Multiline, which has a combined ultrasonographic and fluoroscopic display, large energy density in order to obtain optimum focus (without damaging surrounding tissue) and minimal pain that on rare occasions requires for mild sedation-sedation. Results: From a total of 404 patients included in the study there were 234 (57.92%) male and 170 (42.08%) female patients. The most common type of stone both in female and male patients was calcium type. From a total of 262 calcium stones, 105 of them (40.07%) was present in female patients and 157 (59.92%) in male. Share of infectious type of stone in female patients was 63 (49.60%) and 64 among males (50.39%). Other stones were less abundant in both the gender groups and their total number was only 17. In women their frequency was 2 (13.33%) and 13 among males (86.67%). There was a significant difference in the frequency of different types of stones by gender (?2 = 11.47, p = 0.009). Conclusion: There was no statistically significant correlation between the number of treatments and localization of stones in the ureter, as well as a statistically significant correlation between the size of the stone and the localization of calculus in the ureter. PMID:25568625

Prstojevic, Jelena Kovacevic; Junuzovic, Dzelaludin; Hasanbegovic, Munira; Lepara, Zahid; Selimovic, Mirsad

2014-01-01

360

Pure laparoscopic and robot-assisted laparoscopic reconstructive surgery in congenital megaureter: a single institution experience.  

PubMed

To report our experience of pure laparoscopic and robot-assisted laparoscopic reconstructive surgery in congenital megaureter, seven patients (one bilateral) with symptomatic congenital megaureter underwent pure laparoscopic or robot-assisted laparoscopic surgery. The megaureter was exposed at the level of the blood vessel and was isolated to the bladder narrow area. Extreme ureter trim and submucosal tunnel encapsulation or papillary implantations and anti-reflux ureter bladder anastomosis were performed intraperitoneally by pure laparoscopic or robot-assisted laparoscopic surgery. The clinical data of seven patients after operation were analyzed, including the operation time, intraoperative complications, intraoperative bleeding volumes, postoperative complications, postoperative hospitalization time and pathological results. All of the patients were followed. The operation was successfully performed in seven patients. The mean operation times for pure laparoscopic surgery and robotic-assistant laparoscopic surgery were 175 (range: 150-220) and 187 (range: 170-205) min, respectively, and the mean operative blood loss volumes were 20 (range: 10-30) and 28.75 (range: 15-20) ml, respectively. There were no intraoperative complications. The postoperative drainage time was 5 (range: 4-6) and 5.75 (range: 5-6) d, respectively, and the indwelling catheter time was 6.33 (range: 4-8) d and 7 (range: 7-7) d, respectively. The postoperative hospitalization time was 7.67 (range: 7-8) d and 8 (range: 7-10) d, respectively. There was no obvious pain, no secondary bleeding and no urine leakage after the operation. Postoperative pathology reports revealed chronic urothelial mucosa inflammation. The follow-up results confirmed that all patients were relieved of their symptoms. Both pure laparoscopic and robot-assisted laparoscopic surgery using different anti-reflux ureter bladder anastomoses are safe and effective approaches in the minimally invasive treatment of congenital megaureter. PMID:24924420

Fu, Weijun; Zhang, Xu; Zhang, Xiaoyi; Zhang, Peng; Gao, Jiangping; Dong, Jun; Chen, Guangfu; Xu, Axiang; Ma, Xin; Li, Hongzhao; Shi, Lixin

2014-01-01

361

Luminal and basolateral uptake and degradation of insulin in the proximal tubules of the dog kidney.  

PubMed

In order to determine the major routes of insulin degradation in the body, insulin was labelled with a 'trapped' or 'residualizing' label: [125I]tyramine-cellobiose ([125I]TC) and injected intravenously in dogs. In contrast to conventional iodine-labelled insulin (131I-insulin), the [125I]TC-insulin allows measurements of total uptake in specific organs in vivo because the radioactive degradation products do not leave the cells. One h after the injection of trace doses, the amount of radioactivity recovered in the kidney from [125I]TC-insulin was nine times higher than when conventional [131I]insulin was used. In the blood, the amount of acid-precipitable radioactivity was the same for both labelled preparations, indicating similar clearance rates. A comparison of the uptake of insulin in filtering vs. non-filtering (ureter-occluded) kidneys indicated that the uptake of insulin is twice as high through the luminal than through the basolateral cell membrane; after 60 min, 8.9 +/- 0.8% of the injected [125I]TC-insulin dose remained in the filtering kidney and 3.2 +/- 0.2% of the dose was accumulated in the contralateral kidney, with occluded ureter but normal blood perfusion. In both filtering and non-filtering (ureter-occluded) kidneys, the subcellular distributions of [125I]TC-insulin were studied after various times by isopycnic sedimentation in sucrose gradients. No difference between peritubular and tubular uptake was discernible. The intracellular transport was rapid, leading to accumulation of radioactive label in dense lysosomes within 10 min. PMID:1442137

Hysing, J; Ostensen, J; Tolleshaug, H; Andersen, K J; Kiil, F

1992-10-01

362

Obturator Hernia with Ureteral Entrapment  

PubMed Central

Obturator hernia of the ureter is uncommon. Computed tomography of a 77-year-old woman with sudden-onset lower left abdominal pain and urinary symptoms showed an obturator hernia with ureteral entrapment. Obturator hernia is a diagnostic challenge because the hernial mass is very insidious. It should be suspected in emaciated, multiparous, elderly women presenting with unexplained pain in the groin, hip, thigh or knee. High levels of clinical suspicion of high-risk patients and recourse to investigation by computed tomography are important, as delay in diagnosis and treatment is associated with increased morbidity and mortality. PMID:24926229

Izzo, Matteo; Regusci, Luca; Fasolini, Fabrizio

2014-01-01

363

Postoperative ureteral leak treated using a silicone-covered nitinol stent.  

PubMed

Ureteral fistula is a serious complication of abdomino-pelvic surgeries, often resulting in poor outcomes owing to lack of proper treatment. We report the case of a 49-year-old woman who underwent placement of a silicone-covered ureteral occlusion stent in her right ureter for the management of ureteral leakage after pelvic surgery. A ureterogram obtained 18 months following the stent placement confirmed that there was no stent migration or additional urine leakage. We propose that the silicone-covered ureteral occlusion stent is practical, fast, and safe for the management of ureteral leakage. PMID:25833481

Park, Hyo Jung; Shin, Ji Hoon; Kim, Jong Woo; Hong, Bum Sik

2015-03-01

364

Purinergic mechanosensory transduction and visceral pain  

PubMed Central

In this review, evidence is presented to support the hypothesis that mechanosensory transduction occurs in tubes and sacs and can initiate visceral pain. Experimental evidence for this mechanism in urinary bladder, ureter, gut, lung, uterus, tooth-pulp and tongue is reviewed. Potential therapeutic strategies are considered for the treatment of visceral pain in such conditions as renal colic, interstitial cystitis and inflammatory bowel disease by agents that interfere with mechanosensory transduction in the organs considered, including P2X3 and P2X2/3 receptor antagonists that are orally bioavailable and stable in vivo and agents that inhibit or enhance ATP release and breakdown. PMID:19948030

2009-01-01

365

Postoperative Ureteral Leak Treated Using a Silicone-Covered Nitinol Stent  

PubMed Central

Ureteral fistula is a serious complication of abdomino-pelvic surgeries, often resulting in poor outcomes owing to lack of proper treatment. We report the case of a 49-year-old woman who underwent placement of a silicone-covered ureteral occlusion stent in her right ureter for the management of ureteral leakage after pelvic surgery. A ureterogram obtained 18 months following the stent placement confirmed that there was no stent migration or additional urine leakage. We propose that the silicone-covered ureteral occlusion stent is practical, fast, and safe for the management of ureteral leakage. PMID:25833481

Park, Hyo Jung; Shin, Ji Hoon; Kim, Jong Woo; Hong, Bum Sik

2015-01-01

366

Retrograde ejaculation following open ureteric reimplantation: a case report  

PubMed Central

Introduction Retrograde ejaculation is not a recognized complication of ureteric reimplantation surgery. We describe this unusual complication in a 25-year-old man, with no other cause for his ejaculatory dysfunction. Case presentation A 25-year-old Caucasian man presented with left hydronephrosis ascribed to a megaureter. Following open reimplantation of the ureter, the patient developed retrograde ejaculation that did not respond to medical therapy. Conclusion The key result reported here is that retrograde ejaculation is a possible complication of open pelvic surgery, for which patients should receive counselling. This is relevant for both urologists and general physicians who consult relatively young men with ejaculatory difficulties. PMID:19918274

2009-01-01

367

Unilateral ureteric stone associated with gross hydronephrosis and kidney shrinkage: a cadaveric report  

PubMed Central

Ureteric stones are a common cause of obstruction of the urinary tract, usually presenting with characteristic signs and symptoms, such as acute ureteric colic and hematuria. Occasionally, stones may present with non-specific symptoms such as low back pain and remain unidentified, leading to stone growth, chronic ureteric obstruction and complications such as hydronephrosis and renal damage. Here, we report a large ureteric stone in a cadaver with complete obstruction at the left ureterovesical junction, resulting in severe dilatation of the left ureter and renal pelvis. PMID:25548725

Tay, Ern-Wei; Bay, Boon-Huat

2014-01-01

368

Cross ectopic multicystic dysplastic kidney with ureterocele in nonectopic site  

PubMed Central

Crossed renal ectopy (CRE) is the second most common fusion anomaly of the kidney, with an incidence of 1 in 7000 autopsies; it comes in second after horseshoe kidney. Crossed renal ectopy is associated with an ectopic ureter and generally an ectopic kidney fused with a normal kidney. A 7-month-old boy who had left-to-right crossed non-fused renal ectopy and multicystic renal dysplasia with ureterocele in nonectopic kidney was reported in English language literature. In this article, we present the first case of CRE where surgical intervention has been performed. PMID:23293688

Narc?, Adnan; Korkmaz, Mevlit; Karaku?, Muhittin; ?en, Tolga Altu?; Surer, Îlham?; Çetinkur?un, Salih

2010-01-01

369

Continent cutaneous diversion and external genitalia reconstruction in a child with severe variety urogenital sinus and ambiguous genitalia.  

PubMed

The diagnosis and management of a child with ambiguous genitalia and severe variety of urogenital sinus with a high vesico-vaginal confluence is challenging. This 4-year-old female child had solitary right kidney with ectopic ureter opening in high variety of urogenital sinus with hypo-plastic urinary bladder and incontinence. We describe genitourinary reconstruction with complete functional rehabilitation in this child. This complex problem was managed with continent urinary diversion with Penn pouch and refashioning of external genitalia, rendering continence and near normal female external genitalia. The child and parents are happy with continence and aesthetically normal external genitalia. PMID:25829673

Khemchandani, Sajni I

2015-01-01

370

UPJ Obstruction in the Adult Population: Are Crossing Vessels Significant?  

PubMed Central

Ureteropelvic junction (UPJ) obstruction describes various causes of impaired drainage at the UPJ. Regardless of the cause, the end result is the same: impedance in the normal flow of urine from the renal pelvis into the proximal ureter, resulting in caliectasis and hydronephrosis. This may lead to progressive deterioration of renal function and, thus, often requires intervention to relieve the obstruction and restore the normal flow of urine. Defining the pertinent anatomy, the degree of obstruction, and differential renal function is key to determining whether and when intervention is necessary. PMID:16985690

Grasso, Michael; Caruso, Robert P; Phillips, Courtney K

2001-01-01

371

Pathology Case Study: Bladder Mass in a 73-Year-Old Male  

NSDL National Science Digital Library

This case study, from the University of Pittsburgh School of Medicine's Department of Pathology, presents information about a 73-year-old male patient. According to the patient's history, he has a "history of invasive papillary transitional cell carcinoma with excessive muscular invasion and angiolymphatic invasion." Both gross and microscopic images of the prostate, bladder, pelvic lymph nodes, and the right and left pelvic ureter are provided in this case. Using these images and the provided patient history, students can test their knowledge of pathology and compare their diagnostic findings with the official findings in the "Final Diagnosis" section.

Hakam, Ardeshir

372

Ureteroiliac Artery Fistula in a Young Woman with Short Bowel Syndrome for Radiation Enteritis  

PubMed Central

Ureteral-iliac artery fistula is a rare and potentially life-threatening complication, typically occurring after radiation therapy in already surgically treated cancer patients. This case report describes the diagnostic challenges and the successful management, with the positioning of an intra-arterial prosthesis, of a fistula between the internal iliac artery and the left ureter presenting as massive hematuria in a young woman with history of total colectomy and pelvic radiotherapy for rectal cancer and subsequent wide ileal resections and bilateral ureteral stent positioning for radiation enteritis. Ureteroiliac artery fistulas require a prompt diagnosis and intervention, to avoid life threatening clinical events. PMID:20300556

Santarpia, Lidia; Creta, Massimiliano; Bracale, Umberto Marcello; Ciccarelli, Roberto; Pasanisi, Fabrizio; Contaldo, Franco; Imbimbo, Ciro

2010-01-01

373

Congenital ureteric stenosis: a study of 17 children  

Microsoft Academic Search

Aim  To review cases of congenital ureteric stenosis treated in the period between 1999 and 2007. We propose to analyze the type\\u000a of presentation, management and results.\\u000a \\u000a \\u000a \\u000a Material and methods  We report 17 children aged 20 days to 8 years with obstructive uropathy due to congenital stenosis of the ureter at one or\\u000a more levels. This condition could be mistaken for the more common

Lavanya Kannaiyan; Sampath Karl; John Mathai; Jacob Chacko; Sudipta Sen

2009-01-01

374

Continent cutaneous diversion and external genitalia reconstruction in a child with severe variety urogenital sinus and ambiguous genitalia  

PubMed Central

The diagnosis and management of a child with ambiguous genitalia and severe variety of urogenital sinus with a high vesico-vaginal confluence is challenging. This 4-year-old female child had solitary right kidney with ectopic ureter opening in high variety of urogenital sinus with hypo-plastic urinary bladder and incontinence. We describe genitourinary reconstruction with complete functional rehabilitation in this child. This complex problem was managed with continent urinary diversion with Penn pouch and refashioning of external genitalia, rendering continence and near normal female external genitalia. The child and parents are happy with continence and aesthetically normal external genitalia.

Khemchandani, Sajni I.

2015-01-01

375

Hollow waveguide for urology treatment  

NASA Astrophysics Data System (ADS)

The aim of our work was the application of the special sealed hollow waveguide system for the urology treatment - In our experimental study we have compared the effects of Ho:YAG (wavelength 2100 nm) and Er:YAG (wavelength 2940 nm) laser radiation both on human urinary stones (or compressed plaster samples which serve as a model) fragmentation and soft ureter tissue incision in vitro. Cyclic Olefin Polymer - coated silver (COP/Ag) hollow glass waveguides with inner and outer diameters 700 and 850 ?m, respectively, were used for the experiment. To prevent any liquid to diminish and stop the transmission, the waveguide termination was utilized.

Jelínková, H.; N?mec, M.; Koranda, P.; Pokorný, J.; K?hler, O.; Drlík, P.; Miyagi, M.; Iwai, K.; Matsuura, Y.

2010-02-01

376

Percutaneous Radiofrequency Ablation of a Small Renal Mass Complicated by Appendiceal Perforation  

SciTech Connect

Percutaneous radiofrequency ablation (RFA) has gained wide acceptance as nephron-sparing therapy for small renal masses in select patients. Generally, it is a safe procedure with minor morbidity and acceptable short-term oncologic outcome. However, as a result of the close proximity of vital structures, such as the bowel, ureter, and large vessels, to the ablative field, complications regarding these structures may occur. This is the first article describing appendiceal perforation as a complication of computed tomography-guided RFA despite hydrodissection. When performing this innovative and promising procedure one should be aware of the possibility of particular minor and even major complications.

Boone, Judith, E-mail: j.boone@amc.uva.nl [Antoni van Leeuwenhoek Hospital, Department of Radiology, Netherlands Cancer Institute (Netherlands); Bex, Axel, E-mail: a.bex@nki.nl [Antoni van Leeuwenhoek Hospital, Department of Urology, Netherlands Cancer Institute (Netherlands); Prevoo, Warner, E-mail: w.prevoo@nki.nl [Antoni van Leeuwenhoek Hospital, Department of Radiology, Netherlands Cancer Institute (Netherlands)

2012-06-15

377

A study of the factors influencing the cooking of sour cottonseed meats  

E-print Network

overheating, o "hen thc proper aciditp was reached, the - cats were rolled and. cooked in fifty sound batches, ". . 'he cook's?" was done ureter th followin; conditio~a: z'ivc series of cooks were made, 'x'hc final temperatures werc 2lbo 1 . , 220 22oo F...? 250 i'. , and 235 o -"' ~ "he total time of each cooL was i'orty minutes. m eacl series three runs werc . -mdc in duplicate, makin~- a total of thirty cooks. ln the fire+ run of each series thc temperature was b:. . ou'ht to 1GO . '~'. by the end...

Cates, Charles Allen

1931-01-01

378

Magnetic resonance urography in evaluation of duplicated renal collecting systems.  

PubMed

Duplex renal collecting systems are common congenital anomalies of the upper urinary tract. In most cases they are incidental findings and not associated with additional pathologies. They demonstrate, however, higher incidences of hydroureteronephrosis, ureteroceles, and ectopic ureters. The most comprehensive morphologic and functional evaluation of duplex systems can be achieved using magnetic resonance urography. Functional magnetic resonance urography allows better separation of the renal poles, thus more accurate calculation of the differential renal functions compared with renal scintigraphy. Magnetic resonance urography is the study of choice when upper urinary tract anatomy is complex or when functional evaluation is needed. PMID:24183522

Adeb, Melkamu; Darge, Kassa; Dillman, Jonathan R; Carr, Michael; Epelman, Monica

2013-11-01

379

Rare case of ectopic duplicated megaureter with dysplastic upper kidney moiety opening into ipsilateral ejaculatory duct.  

PubMed

A rare case of left mesonephric duct malformation consisting of a duplicated ectopic megaureter opening into the ejaculatory duct and ipsilateral upper moiety cystic renal dysplasia is reported to increase awareness among urologists and radiologists of this entity. Magnetic resonance imaging has been shown to be an excellent diagnostic tool for tracking of the trajectory of the ectopic ureter, thereby obviating the need for other invasive diagnostic techniques and permitting surgical correction of the anomaly. The embryology, clinical features, and diagnostic and therapeutic aspects of this rare malformation are presented. PMID:16979712

Stimac, Goran; Sucic, Mario; Brigic, Ivica; Trnski, Davor

2006-09-01

380

Minimally invasive surgical approach to excision of symptomatic ectopic inverted-Y ureteral duplications.  

PubMed

Inverted-Y ureteral duplications are a rare duplication anomaly with few cases reported in the literature. We report a novel minimally invasive approach to managing inverted-Y duplications in two females who presented with continuous urinary incontinence and were found to have an ectopic insertion of the duplicated ureter. The ectopic segment was excised laparoscopically without complication in the outpatient setting with resultant cure of the continuous incontinence. This represents the first report of a laparoscopic approach to this rare anomaly. PMID:23140938

Upadhyay, Jyoti; Zuckerman, Jack M; Shekarriz, Bijan

2013-04-01

381

True duplication of the vas deferens: a case report and review of literature  

Microsoft Academic Search

Background  Duplication of the vas deferens is the identification of a second vas deferens within the spermatic cord; it is a rarely reported\\u000a congenital anomaly. Duplicate vas deferens should not be confused with double vas deferens that describes ipsilateral renal\\u000a agenesis with a blind ureter ending in the ejaculatory system.\\u000a \\u000a \\u000a \\u000a \\u000a Data sources  We present a case of duplicated vas deferens, and a

Mike K. LiangAnuradha; Anuradha Subramanian; John Weedin; Donald P. Griffith; Samir S. Awad

382

Laser lithotripsy for ureteric calculi: Results in 250 patients.  

E-print Network

Two hundred andfifty patients with 290 stones presenting to the Department of Urology were treated with the Candela MDL 2000.M Laser Lithotripter. Overall stone clearance racte was 95%. The inore proximal the calculus the lower the success rate. Ninety eight percent ofstones in the lower ureter, 95 % ofmid ureteric and 91 % ofupper ureteric stones were cleared. The miajor complication was perforation which occurred in 6 % ofcases. This procedure is a safe and effective treatmentfor ureteric calculi and is associated with a low complicationi rate and a high clearance rate. Laser lithotripsy is the optimum ureteroscopic mlethod of treating ureteric calculi and is complimentary to extra corporeal shock wave lithotripsy.

1995-01-01

383

doi:10.1155/2012/656023 Research Article A Rare Location of Metastasis from Prostate Cancer:  

E-print Network

License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Prostate carcinoma is a very rare origin of metastatic disease in the ureter. We report a case of a 74-year-old man who presented in November 2008 initially with flank pain and lower urinary tract symptoms. Diagnostic investigation revealed a skeletal metastasizing prostate carcinoma, and the cause for the flank pain was a hydronephrosis due to ureteral metastasis diagnosed by biopsy. Antihormonal treatment led to disappearance of the hydronephrosis; however, further progress finally ended in acute liver failure with patient’s death in July 2010. 1.

2011-01-01

384

Emphysematous pyelonephritis in a diabetic patient with obstructed kidney  

PubMed Central

Emphysematous pyelonephritis (EPN) is an acute, rare, inflammatory disease, which typically occurs in patients who suffer from diabetes mellitus. We report the case of a patient who was admitted to the Department of Urology with septic signs, in whom, after performing computed tomography, the diagnosis of EPN was established. The patient underwent organ–preserving treatment, which consisted of pyelolithotomy with nephrostomy, and the insertion of a double J catheter into the left ureter. The importance of the classification of EPN is also discussed. The need for individualized procedures is highlighted. PMID:25147731

Konecki, Tomasz; Jab?onowski, Zbigniew

2014-01-01

385

Laparoscopic-assisted low anterior resection of the rectum—a review of the fascial composition in the pelvic space  

Microsoft Academic Search

Introduction  Outcomes of rectal cancer treatment depend on the operative technique, and complication rates vary. Complications can occur\\u000a during mobilization of the rectum, with damage to the ureter, autonomic nerves, and the rectum itself. Frequencies of these\\u000a complications can be reduced by careful dissection of the correct tissue plane in the pelvic space.\\u000a \\u000a \\u000a \\u000a \\u000a Methodology  This paper reviews the fascial composition of the

Makio Mike; Nobuyasu Kano

2011-01-01

386

Endoscopic management of a chronic ureterocutaneous fistula using cyanoacrylic glue  

PubMed Central

Ureterocutaneous fistula is a rare complication of renal surgery. Cyanoacrylate glue is a tissue adhesive, used primarily for the endoscopic control of bleeding from gastric varices. A female aged 33 presented to our facility with a ureterocutaneous fistula after surgery. We used a retrograde endoscopic approach for the instillation of 2 ml of sealant into the ureteral lumen to seal the ureter and fistulous tract. The fistulous opening healed spontaneously a week after the procedure, and the patient remained dry and symptom free for 5 months following the procedure. Endoscopic delivery of cyanoacrylate sealant was a feasible and effective way in treating a ureterocutaneous fistula in our patient. PMID:25667771

Abdulwahab–Ahmed, Abdullah; El Mahdey, Alla El Deen

2014-01-01

387

Spontaneous Pelvic Rupture as a Result of Renal Colic in a Patient with Klinefelter Syndrome  

PubMed Central

We present the case of a young man with Klinefelter syndrome, who was admitted to our clinic with renal colic. Shortly after admittance, spontaneous decrease in pain has occurred. Ultrasound and intravenous contrast computed tomography were performed, which showed the evidence of urine extravasation at the level of left renal pelvis and a 4?mm stone in the lower third of the left ureter. The management with a double-J ureteric stent for three weeks was successful. Then, the stent was removed and computed tomography confirmed the absence of urine extravasation. We also analyze the literature related to this case and discuss the main mechanisms of collecting system rupture. PMID:23585981

Reva, Sergey; Tolkach, Yuri

2013-01-01

388

[The action of dynamic amplipulse therapy on the urodynamics of the upper urinary tract in patients with kidney and ureteral stone fragments following extracorporeal shockwave lithotripsy].  

PubMed

Experimental data demonstrate that sinusoidal modulated currents are capable of increasing the frequency and amplitude of smooth muscle biopotentials in animal ureter. Basing on these findings, the authors conducted stone fragments elimination from the upper urinary tracts of patients subjected to pulse lithotripsy by means of an original physiotherapeutic complex: oral mineral water, sodium chloride baths, dynamic amplipulse therapy with 3-4 electrodes pairs applied on the renal area and different ureteral regions. The stones passage from the upper urinary tracts was reported in 91.7% of the cases. Functional improvement in the affected kidney is attributed to the stone elimination and antiinflammatory action of the above balneotherapeutic complex. PMID:1295219

Li, A A; Malikova, S N; Nesterov, N I

1992-01-01

389

Automatic segmentation of medical images for renal calculi and analysis.  

PubMed

Development of an automated system to identify renal calculi based on its physical characteristics is proposed. Calculi are due to abnormal collection of certain chemicals like oxalate, phosphate and uric arid. Renal calculi may be present in kidney, ureter or in urinary bladder. An algorithm is proposed to detect calculus using its shadow. The system also extracts the properties of calculi such as size, shape and location, which are vital for reliable diagnosis. This method has been implemented in the MATLAB/IDL platform and a considerable success rate is obtained. PMID:11347425

Sridhar, S; Kumaravel, N

2001-01-01

390

Is there a need to do routine sonological, urodynamic study and cystourethroscopic evaluation of patients with simple hypospadias?  

Microsoft Academic Search

Objectives  To study the patients with hypospadias for urinary tract anomalies, bladder functions and the anatomical changes in the urethra,\\u000a bladder and ureters.\\u000a \\u000a \\u000a \\u000a \\u000a Patients and methods  65 cases of untreated hypospadias (14 anterior, 46 mid penile, 5 posterior penile) presenting between 1 and 14 years age were\\u000a evaluated with ultrasonography, urodynamic study, uroflowmetry and intraoperative cystourethroscopy.\\u000a \\u000a \\u000a \\u000a \\u000a Results  Ultrasound showed abnormalities in 12\\/65 (18.46%) with

Lucky Gupta; Shilpa Sharma; Devendra K. Gupta

2010-01-01

391

“The creeping tumor:” An unusual presentation of upper urinary tract malignancy  

PubMed Central

Upper urinary tract urothelial malignancy accounts for 5-10% of urothelial carcinomas. Synchronous bladder carcinoma occurs in 2-4% of patients with upper urinary tract tumors. Urothelial malignancy involving the entire upper urinary tract is an extremely rare entity. Most upper urinary tract malignancies are transitional cell carcinomas (TCC), of which the sarcomatoid variant is very rare. These tumors pose a challenge to the radiologist. We herein report a case of TCC involving the entire collecting system of the left kidney, extending down along the ureter and projecting as a mass in the bladder. PMID:25378833

Selvaraj, Velaiyan; Govindarajan, Periasamy; Deepak, M.; Sivaraj, Manoharan

2014-01-01

392

"The creeping tumor:" An unusual presentation of upper urinary tract malignancy.  

PubMed

Upper urinary tract urothelial malignancy accounts for 5-10% of urothelial carcinomas. Synchronous bladder carcinoma occurs in 2-4% of patients with upper urinary tract tumors. Urothelial malignancy involving the entire upper urinary tract is an extremely rare entity. Most upper urinary tract malignancies are transitional cell carcinomas (TCC), of which the sarcomatoid variant is very rare. These tumors pose a challenge to the radiologist. We herein report a case of TCC involving the entire collecting system of the left kidney, extending down along the ureter and projecting as a mass in the bladder. PMID:25378833

Selvaraj, Velaiyan; Govindarajan, Periasamy; Deepak, M; Sivaraj, Manoharan

2014-10-01

393

Pathological and therapeutic significance of cellular invasion by Proteus mirabilis in an enterocystoplasty infection stone model  

Microsoft Academic Search

Proteus mirabilis infection often leads to stone formation. We evaluated\\u000a how bacterium-mucin adhesion, invasion, and intracellular crystal\\u000a formation are related to antibiotic sensitivity and may cause frequent\\u000a stone formation in enterocystoplasties. Five intestinal (Caco-2, HT29,\\u000a HT29-18N2, HT29-FU, and HT29-MTX) and one ureter cell line (SV-HUC-1) were\\u000a incubated in artificial urine with five Proteus mirabilis strains.\\u000a Fluorescence-activated cell sorting (FACS), laser

Rejiv B. Mathoera; Dik J. Kok; Cees M. Verduin; J. M. Nijman

2002-01-01

394

A rare cause of massive haematuria: Internal iliac artery-ureteric fistula.  

PubMed

Ureteric fistula into the arterial tree is a well-recognised, but uncommon condition. The involvement of internal iliac artery is rare. We present a rare case of fistulous communication and subsequent infection of an internal iliac artery aneurysm and ureter secondary to insertion of ureteric stent following endovascular exclusion of the aneurysm and its management. Nephrostogram identified the fistula not seen on computerised tomography. This case highlights the awareness of such pathology allowing for prompt recognition of the condition and importance of appropriate imaging. PMID:24903530

Rao, Ahsan M; Khalil, Ahmed; Suttie, Stuart

2015-04-01

395

Retrograde Positive Contrast Urethrocystography of the Fish Urogenital System  

PubMed Central

The radiological differences between the urinary tract of??Dicentrarchus labrax, Sparus aurata, Tinca tinca, and Cyprinus carpio are shown. In fresh water teleosts the urinary bladder is sigmoid and a short urethra leads to the urinary pore. Genital and anal pores are present. In Sparus aurata the urinary bladder has a globoid shape. In Dicentrarchus labrax the urinary bladder is smaller and elongate. In both marine teleosts a single urogenital pore is visible. Positive contrast was used to survey the urogenital system and evaluate shape and size of the bladder, urethra, ureter, and gonadal ducts. Results demonstrate the morphological variability of the urinary bladder and the craniodorsal entry of the ureters into the bladder. It is envisaged that this work will provide baseline information for further imaging studies for investigating the urogenital morphology and can be applied to identify disorders in fishes. Furthermore, the main interest of this study is that it demonstrates the morphological variability of the lower urinary system that exists between different species of fishes. PMID:25180198

Pugliese, Michela; Pietro, Simona Di; Zaccone, Daniele; Giorgianni, Pietro; Bonfiglio, Rossella

2014-01-01

396

Nephroliths and ureteroliths: a new stone age.  

PubMed

Nephroliths may obstruct the renal pelvis or ureter, predispose to pyelonephritis, or result in compressive injury of the renal parenchyma leading to progressive chronic kidney disease. Indications for removal of nephroliths in dogs include obstruction, recurrent infection, progressive nephrolith enlargement, presence of clinical signs (renal pain), and patients with nephroliths in a solitary functional kidney. The most common indication for removal of upper tract uroliths in cats is ureteral obstruction caused by ureteroliths. Nonobstructive nephroliths in cats are not usually treated unless they move into the ureter resulting in ureteral obstruction. The treatment approach to nephroliths and ureteroliths is different for dogs versus cats. Surgical removal of nephroliths or ureteroliths by nephrotomy and ureterotomy respectively is associated with potential for complications in more than 30% of cats treated by ureterotomy; therefore, minimally invasive options should also be considered. Extracorporeal shock wave lithotripsy (ESWL) treatment of nephroliths results in small "passable" stone fragments in most dogs, whereas ESWL does not work effectively in cats. Ureteral stents are effective for relief of ureteral obstruction by ureteroliths in both dogs and cats. Ureteral stents may be left in place long-term to relieve ureteral obstruction by ureteroliths. Post-operative morbidity and mortality are substantially lower for ureteral stent placement compared to open surgical ureterotomy in cats. PMID:23484823

Adams, L G

2013-07-01

397

[Successful combination chemotherapy of gemcitabine plus nedaplatin for invasive ureteral squamous cell carcinoma].  

PubMed

A 77-year-old female was indicated pelvic mass and hydronephrosis when her examination of advanced gastric cancer. Computed tomography revealed left ureteral dilatation and mass around the left ureter. Laparotomy biopsy was abandoned because of her low cardiac function. Thereafter, hemorrhagic stool was observed and colonoscopy revealed hemorrhagic mucosal protrusion at sigmoid colon. This lesion was diagnosed as squamous cell carcinoma by pathology of biopsy specimen. Colonic invasion of other organ carcinoma was suspected by colonoscopic findings. Retrograde pyelogram revealed a defect of left lower ureter. Positron emission tomography revealed the mass excluding sigmoid colon and high value (SUV max was 10.3) at the mass. Therefore, it was diagnosed invasive ureteral squamous cell carcinoma and she was treated with 2 cycles of combination chemotherapy consisting of gemcitabine (800 mg/m2: day 1 and 8) and nedaplatin (60 mg/m2: day 1). During the chemotherapy, only cytopenia (grade 4: CTCAE guidelines) was observed. About 4 months after 2 courses of chemotherapy, the tumor size was reduced by almost 100% (CR; RECIST guidelines). Thereafter, recurrence of pelvic mass was not observed. PMID:25158556

Yamada, Yasutaka; Kohno, Mitsuru; Namura, Kazuhiro; Sawada, Takuto; Fujikawa, Atsushi; Ota, Junichi; Moriyama, Masatoshi

2014-07-01

398

Current Status of Gil-Vernet Trigonoplasty Technique  

PubMed Central

Significant controversy exists regarding vesicoureteral reflux (VUR) management, due to lack of sufficient prospective studies. The rationale for surgical management is that VUR can cause recurrent episodes of pyelonephritis and long-term renal damage. Several surgical techniques have been introduced during the past decades. Open anti-reflux operations have high success rate, exceeding 95%, and long durability. The goal of this article is to review the Gil-Vernet trigonoplasty technique, which is a simple and highly successful technique but has not gained the attention it deserves. The mainstay of this technique is approximation of medial aspects of ureteral orifices to midline by one mattress suture. A unique advantage of Gil-Vernet trigonoplasty is its bilateral nature, which results in prevention from contralateral new reflux. Regarding not altering the normal course of the ureter in Gil-Vernet procedure, later catheterization of and retrograde access to the ureter can be performed normally. There is no report of ureterovesical junction obstruction following Gil-Vernet procedure. Gil-Vernet trigonoplasty can be performed without inserting a bladder catheter and drain on an outpatient setting. Several exclusive advantages of Gil-Vernet trigonoplasty make it necessary to reconsider the technique role in VUR management. PMID:18682815

Simforoosh, Nasser; Radfar, Mohammad H.

2008-01-01

399

Surgical complications after kidney transplantation: different impacts of immunosuppression, graft function, patient variables, and surgical performance.  

PubMed

The population of kidney transplant (KTx) recipients often has complex medical and immunological conditions. Surgical complications (SCs) contribute to the increasing morbidity and costs in these patients. We analyzed the risk factors for SC in 405 KTx patients treated using defined immunosuppressive regimens according to their clinical and immunological risk profile: (1) standard immunosuppression (SIS) with IL-2 receptor mAb, CNI, and (a) mycophenolic acid (MPA) or (b) mTOR inhibitor; and (2) more intense immunosuppression (IIS) with (a) ATG or (b) the additional use of plasma exchange and B- and T-cell-depleting agents. In a mixed effects logistic regression model, we identified the following risk factors for SC: male gender, diabetes, and post-operative dialysis. No difference was found between the patients who received SIS with MPA and those who received mTOR inhibitors. The risk of suffering complications with IIS increases with age. In addition to IIS, diabetes was a risk for wound healing disorders. Therapeutic anticoagulation and a third or subsequent retransplantation increased the rate of bleeding. We did not identify immunosuppression or patient demographics as risk factors for lymphoceles or ureter complications; however, we demonstrated that the surgeon had a significant impact on severe complications, especially those of the ureter. PMID:25598053

Koch, Martina; Kantas, Alexandros; Ramcke, Katja; Drabik, Anna I; Nashan, Björn

2015-03-01

400

Use of invisible near infrared light fluorescence with indocyanine green and methylene blue in urology. Part 2  

PubMed Central

Introduction In the second part of this paper, concerning the use of invisible near infrared light (NIR) fluorescence with indocyanine green (ICG) and methylene blue (MB) in urology, other possible uses of this new technique will be presented. In kidney transplantation, this concerns allograft perfusion and real time NIR–guided angiography; moreover, perfusion angiography of tissue flaps, NIRF visualization of ureters, NIR–guided visualization of urinary calcifications, NIRF in male infertility and semen quality assessment. In this part, we have also analysed cancer targeting and imaging fluorophores as well as cost benefits associated with the use of these new techniques. Material and methods PubMed and Medline databases were searched for ICG and MB use in urological settings, along with data published in abstracts of urological conferences. Results Although NIR–guided ICG and MB are still in their initial phases, there have been significant developments in a few more major domains of urology, including 1) kidney transplantation: kidney allograft perfusion and vessel reconstruction; 2) angiography perfusion of tissue flaps; 3) visualization of ureters; 4) visualization of urinary calcifications; and 5) NIRF in male infertility and semen quality assessment. Conclusions Near infrared technology in urology is at its early stages. More studies are needed to assess the true potential and limitations of the technology. Initial studies show that this pioneering tool may influence various aspects of urology. PMID:25247093

Markuszewski, Marcin; Rho, Young Soo; Matuszewski, Marcin

2014-01-01

401

Arsenic in drinking water and incidence of urinary cancers.  

PubMed

The associations between arsenic ingestion and cancers of the bladder and kidney have been documented in Taiwan. To evaluate further such associations for urinary cancers of various cell types, we conducted an ecologic study encompassing 243 townships using cancer registry data of patients diagnosed between 1980 and 1987. We used the proportions of wells with various specified arsenic levels in each township as indicators of exposure and evaluated the effects of urbanization and smoking by an urbanization index and the number of cigarettes sold per capita. In both genders, we observed associations of high arsenic levels in drinking water with transitional cell carcinomas of the bladder, kidney, and ureter and all urethral cancers combined. We also observed such associations in adenocarcinomas of the bladder in males, but not in squamous cell carcinomas of the bladder or renal cell carcinomas or nephroblastomas of the kidney. There was also a positive association between the urbanization index and transitional cell carcinomas of the ureter in males. The number of cigarettes sold per capita was not a good predictor for urinary cancers. The results indicate that the carcinogenicity of arsenic may be cell type specific. PMID:9270957

Guo, H R; Chiang, H S; Hu, H; Lipsitz, S R; Monson, R R

1997-09-01

402

Biological consequences of fiber fragmentation with pulsed laser lithotripsy  

NASA Astrophysics Data System (ADS)

Fiber tip breakage during urinary and biliary laser lithotripsy has been recognized to occur with several laser types. This phenomenon has also been seen with Q-switched Nd:YAG laser lithotripsy. Our aim was to determine the biological consequences of this event in the canine ureter and bile duct. In an excised tissue preparation, urinary and biliary stones were impacted in a canine ureter and common bile duct. Three and four hundred micron quartz laser fibers were placed in direct contact with the stone. Normal saline coaxial irrigation was initiated at 75 xal/min. A Q-switched Nd:YAG laser was activated at repetition rates from 1O-30 Hz. and pulse energies from 10-30 mJ. The tissue was sectioned and microscopic examination of the fragmentation site was performed. Histological exam revealed the persistence of large numbers of fiber fragments in the lumen and imnbedded in the epithelium at the lithotripsy site. Fragments varied greatly in size and appeared to have angular, sharp edges We conclude that irrigation can not be relied upon to remove the fiber fragments from the lithotripsy sites and that the biological consequences of fiber fragmentation may be greater than previously believed. Glass fragments "blown" into the epitheliumu will often result in glass granulomas, which may eventually cause obstruction of closed lumninal structures. This raises serious concern for the presence of any fiber breakage during laser lithotripsy.

Bruhn, Erich W.; Go, Peter M. N. Y. H.; McClane, Robert W.; Hunter, John G.; Straight, Richard C.

1990-06-01

403

Ureteric stricture secondary to unusual extension of prostatic adenocarcinoma.  

PubMed

This article describes an unusual finding in a patient who presented with an adenocarcinoma of the prostate and right hydronephrosis. A 68-year-old male presented with right hydronephrosis and a PSA of 96. DRE was consistent with cT3 carcinoma. Cystoscopy showed an exophytic superficial transitional cell carcinoma (TCC) of the bladder and a transrectal biopsy of the prostate confirmed adenocarcinoma Gleason score 4+3. Staging investigations (CT pelvis and bone scan) were negative; androgen deprivation therapy was therefore initiated for the prostatic adenocarcinoma. Upper tract imaging showed multiple filling defects in the proximal ureter. Ureteroscopy showed a stricture at the level of the iliac vessels. With a working diagnosis of upper tract TCC, right open nephroureterectomy was performed. Final histology showed prostatic adenocarcinoma infiltrating the adventitia of the entire ureter up to the level of the renal pelvis. A rare cause of ureteric stricture, contiguous spread of prostatic adenocarcinoma, should be considered in the differential diagnosis of patients presenting with upper tract obstruction and a known history of prostatic adenocarcinoma. Androgen deprivation therapy for several months did not seem to cause resolution of the tumor in the periureteric, ureteric and perihilar tissues. PMID:20156388

Chalasani, Venu; Macek, Petr; O'Neill, Gordon F; Barret, Wade

2010-02-01

404

Squamous cell carcinoma in a duplicated renal pelvis  

PubMed Central

We report an extremely rare case of squamous cell carcinoma (SCC) of the renal pelvis associated with an incompletely duplicated renal pelvis and ureter. A 71-year-old woman presented with left lower back pain and gross hematuria. Urinary cytology showed atypical squamous cells. Computed tomography, magnetic resonance imaging and retrograde pyelography revealed left incompletely duplicated renal pelvis and ureter and a mass in the left upper renal pelvis. A clinical diagnosis of left renal pelvic cancer was made and the patient underwent total nephroureterectomy. Histological examination of the resected specimen revealed SCC with marked keratinization in the upper renal pelvis. The tumor had invaded the renal parenchyma and perinephric fat. There was no urothelial carcinoma component. The pathological stage was pT4 N0. There was no evidence of recurrence 6 months postoperatively. Because the prognosis of SCC of the upper urinary tract is poor, urologists and pathologists should be aware that SCC may develop in duplicated urinary systems. PMID:25550838

Ogawa, Makiko; Morikawa, Teppei; Toyoshima, Toyoaki; Fukayama, Masashi

2014-01-01

405

Action of 2-hydroxy-4,6-dimethoxyacetophenone isolated from Sebastiania schottiana.  

PubMed

The inhibitory action of the major constituent of Sebastiania schottiana (Euphorbiaceae), 2-hydroxy-4,6-dimethoxyacetophenone (xanthoxyline) on contractions induced by agonists and electrical stimulation of smooth and cardiac muscle preparations was analysed. Xanthoxyline (30 to 300 microM) inhibited contractions of the rat uterus, guinea-pig ileum, and urinary bladder induced by several agonists in a non-competitive, non-selective, concentration-related manner, with the IC50's ranging between 47 and 190 microM. Twitches evoked by electrical-stimulation of strips of guinea-pig longitudinal ileum, urinary bladder, dog ureter, and rat left atrium were also inhibited dose-dependently by cumulative additions of xanthoxyline (IC50's between 50 and 480 microM). Xanthoxyline was found to be a potent inhibitor of spontaneous contractions of the circular smooth muscle layer of the dog ureter, yielding an IC50 of 54 microM. Repeated washing of all preparations completely reversed the inhibitory effects of xanthoxyline. Therefore, it appears that xanthoxyline induces a direct and non-selective inhibition of contractions triggered by agonists or electrical stimulation of smooth and cardiac muscle preparations. The elucidation of the mechanism(s) by which xanthoxyline induced muscle relaxation requires further investigations. PMID:2356240

Calixto, J B; Miguel, O G; Yunes, R A; Rae, G A

1990-02-01

406

Laparoscopic nephrectomy in children for benign conditions: indications and outcome  

PubMed Central

Aim: To analyze the indications and outcome of laparoscopic nephrectomy for benign non-functioning kidneys in children. Materials and Methods: The data of all patients operated over a 10 year period was retrospectively analyzed. Results: There were 56 children, aged 4 months to 12 years with a male: female ratio of 2.3:1. The most common presentation in boys and girls was urinary tract infection (UTI) (61.5% and 47.05% respectively). Incontinence due to ectopic ureter was a close second in girls (41.17%). The most common underlying conditions were vesico-ureteric reflux (42.85%) and multicystic dysplastic kidney (23.2%). There were 6 nephrectomies, 4 heminephroureterectomies and the remaining nephroureterectomies. All children tolerated the surgery well. One patient underwent a concomitant cholecystectomy. The post-operative problems encountered were UTI (1), urine retention (1), pyonephrosis in the opposite kidney and development of contra-lateral reflux (1). All others had resolution of pre-operative symptoms with good cosmesis. Conclusions: As per available literature, this appears to be the largest Indian series of pediatric laparoscopic nephrectomies for benign non-functioning kidneys. Laparoscopic approach gives excellent results provided pre-operative investigations rule out other causes for the symptoms with which the patient presents. Often it is not the kidney but the dilated dysplastic ureter which is the seat of stasis and infection or pain and therefore should be completely removed. PMID:24604980

Menon, Prema; Handu, Abhilasha T; Rao, Katragadda Lakshmi Narasimha; Arora, Suman

2014-01-01

407

Modified laparoscopic intravesical nonrefluxing ureteral reimplantation with psoas hitch using a submucosal tunneling.  

PubMed

We aimed to study the safety and efficacy of the cystoscopy-assisted nonrefluxing ureteral reimplantation technique using submucosal tunneling during laparoscopic ureteroneocystostomy (UNC) with a psoas hitch in patients with distal ureter stricture after gynecologic surgery. We reviewed six female patients who underwent gynecological surgeries. All patients showed persistent postoperative distal ureter stricture or obstruction. These patients underwent laparoscopic nonrefluxing UNC with a psoas hitch using a submucosal tunneling technique combined with cystoscopy at our institute. They had corrective surgery at an average of 13.3 weeks after ureteral injury. The short-term success was confirmed either by voiding cystourethrography (VCU) or by diuretic isotope renal scan (MAG-3) conducted 3 months after the operation. None of the patients showed evidence of postoperative stricture at the reimplanted site and reflux on either MAG-3 renal scan or VCU. None of the patients showed major or minor complications during follow-up. It is safe and feasible to perform the laparoscopic nonrefluxing UNC with a psoas hitch using a submucosal tunneling technique combined with cystoscopy for ureteral stricture. PMID:25610823

Kim, Chang-Hee; Ro, Joo Hwan; Jung, Han

2014-12-01

408

Vesicoureteral Reflux and Other Urinary Tract Malformations in Mice Compound Heterozygous for Pax2 and Emx2  

PubMed Central

Congenital anomalies of the kidney and urinary tract (CAKUT) are the most common cause of chronic kidney disease in children. This disease group includes a spectrum of urinary tract defects including vesicoureteral reflux, duplex kidneys and other developmental defects that can be found alone or in combination. To identify new regulators of CAKUT, we tested the genetic cooperativity between several key regulators of urogenital system development in mice. We found a high incidence of urinary tract anomalies in Pax2;Emx2 compound heterozygous mice that are not found in single heterozygous mice. Pax2+/?;Emx2+/? mice harbor duplex systems associated with urinary tract obstruction, bifid ureter and a high penetrance of vesicoureteral reflux. Remarkably, most compound heterozygous mice refluxed at low intravesical pressure. Early analysis of Pax2+/?;Emx2+/? embryos point to ureter budding defects as the primary cause of urinary tract anomalies. We additionally establish Pax2 as a direct regulator of Emx2 expression in the Wolffian duct. Together, these results identify a haploinsufficient genetic combination resulting in CAKUT-like phenotype, including a high sensitivity to vesicoureteral reflux. As both genes are located on human chromosome 10q, which is lost in a proportion of VUR patients, these findings may help understand VUR and CAKUT in humans. PMID:21731775

Boualia, Sami K.; Gaitan, Yaned; Murawski, Inga; Nadon, Robert; Gupta, Indra R.; Bouchard, Maxime

2011-01-01

409

[Optimization of diagnostic and therapeutic tactics for primary megaureter in children].  

PubMed

Obstructive megaureter (MU) and refluxing MU were treated in 2000-2004 in 580 and 711 children, respectively. This number was by 18.9% higher than in 1990-1994. Out of 1291 children with MU, two groups of patients were singled out: group 1 with primary obstructive MU (n = 158) and group 2 with primary refluxing MU (n = 185). In patients of groups 1 and 2 the following operations were made: ureteral reimplantation (n = 126), Koen's operation (n = 104), Politano-Leadbetter operation (n = 12), Lich-Greguaru operation (n = 8), nephrureterectomy (n = 32), heminephrureterectomy (n = 27), transurethral dissection of ureterocele (n = 8), other in 26 patients. A great number of primary nephrureterectomies evidence for frequent morphofunctional immaturity of one of the kidneys in children with primary MU forms. The 1.5-6 year follow-up results were good in 85.4% children of group 1 and 94.1% children of group 2. In planning follow-up and assessing long-term follow-up results morphofunctional state of the kidney and ureter before and after operation must be considered according to the following main criteria: dilation of the caliceal-pelvic system and ureter, renal function, pyelonephritis activity, the presence or absence of recurrent stricture of the distal ureteric segment or the presence of vesicoureteral reflux. PMID:17722624

Iushko, E I; Strotski?, A V; Skobeius, I A; Gerasimovich, A I

2007-01-01

410

Urolithiasis in adults with congenital megaureter  

PubMed Central

The primary presentation of congenital megaureter in adults is rare. Development of urolithiasis may lead to this unusual underlying diagnosis. Urinary tract stones can form either within the dilated ureteral segment or in a part of the upper urinary tract proximal to the abnormal ureteral segment. We report two cases of nephrolithiasis that occurred in adults found to have segmental megaureter. The first case is that of a 58-year-old man who presented with left lower quadrant pain. Computed tomography scan revealed a 2-cm stone in the distal left ureter within an area of isolated segmental distal ureteral dilation. The second case is a 48-year-old man who developed recurrent renal urolithiasis associated with isolated distal megaureter. Although a rare condition in adults, congenital megaureter may present when kidney stones develop as a result of the ureteral abnormality. Typically, stones will develop within the dilated segment of ureter. Atypically, stones may develop away from the site of the underlying abnormality. Congenital megaureter is a diagnosis that urologists and radiologists need to consider in the setting of isolated distal ureteral dilation, as the diagnosis of adult megaureter may require more involved surgical measures to prevent recurrence of adverse symptoms. PMID:20019959

Rosenblatt, Gregory S.; Takesita, Ken; Fuchs, Gerhard J.

2009-01-01

411

Upper-urinary-tract urothelial tumors: conservative treatment by Nd:YAG laser  

NASA Astrophysics Data System (ADS)

Upper urinary malignancies are rare tumors whose diagnosis sometimes represents a difficult dilemma. In selected cases, it is possible to treat the tumor with laser irradiation. This approach is reserved to low-stage low-grade tumors, a tumor in a solitary kidney, bilateral syncroneous disease or patients with deterioration of renal function. Thirty one patients suspected to have malignancies, as they presented upper tract filling defects at IVP, underwent uretero-pyeloscopy to confirm the diagnosis. Twenty patients with upper urinary tract urothelial tumors were treated with Nd:YAG laser irradiation. Before the procedure, the ureter and the pelvis were accessed by 0.038 inch guide-wire or 4 French ureteral catheter. A power of 25 - 30 watts/3 seconds was carried out for the laser irradiation of the tumor and of the base. Sometime after the procedure a ureter single J catheter was left indwelling for 48 hours. In the follow-up the patients had endoscopic surveillance every three months. Actually 12 patients are tumor-free after 3 - 36 months. Eight patients had a recurrence after the first treatment and they underwent new laser irradiation. All the recurrences were in other sites of the upper urinary tract and seemed to be related to tumor grade. In conclusion, conservative endourological ureteropyeloscopy coupled with Nd:YAG laser irradiation should be considered a useful treatment in selected patients.

Gaboardi, Franco; Bozzola, Andrea; Melodia, Tommaso; Gulfi, Gildo M.; Galli, Stefano

1993-05-01

412

Identification of telocytes in the upper lamina propria of the human urinary tract  

PubMed Central

The upper lamina propria (ULP) area of interstitial cells (IC) has been studied extensively in bladder, but is rather unexplored in the rest of the urinary tract. This cell layer is intriguing because of the localization directly underneath the urothelium, the intercellular contacts and the close relationship with nerve endings and capillaries. In this study, we examine the ULP layer of IC in human renal pelvis, ureter and urethra, and we make a comparison with ULP IC in bladder. Tissue was obtained from normal areas in nephrectomy, cystectomy and prostatectomy specimens, and processed for morphology, immunohistochemistry and electron microscopy. A morphological and immunohistochemical phenotype for the ULP IC was assessed and region-dependent differences were looked for. The ULP IC in renal pelvis, ureter and urethra had a similar ultrastructural phenotype, which differed somehow from that of bladder IC, that is, thinner and longer cytoplasmic processes, no peripheral actin filaments and presence of dense core granules and microtubules. Together with their immunohistochemical profile, these features are most compatible with the phenotype of telocytes, a recently discovered group of stromal cells. Based on their global ultrastructural and immunohistochemical phenotype, ULP IC in human bladder should also be classified as telocytes. The most striking immunohistochemical finding was the variable expression of oestrogen receptor (ER) and progesterone receptor (PR). The functional relevance of ULP telocytes in the urinary tract remains to be elucidated, and ER and PR might therefore be promising pharmacological research targets. PMID:22151349

Gevaert, Thomas; Vos, Rita; Aa, Frank; Joniau, Steven; Oord, Joost; Roskams, Tania; Ridder, Dirk

2012-01-01

413

Islet1 Deletion Causes Kidney Agenesis and Hydroureter Resembling CAKUT  

PubMed Central

Islet1 (Isl1) is a transcription factor transiently expressed in a subset of heart and limb progenitors. During studies of limb development, conditional Isl1 deletion produced unexpected kidney abnormalities. Here, we studied the renal expression of Isl1 and whether it has a role in kidney development. In situ hybridization revealed Isl1 expression in the mesenchymal cells surrounding the base of the ureteric bud in mice. Conditional deletion of Isl1 caused kidney agenesis or hypoplasia and hydroureter, a phenotype resembling human congenital anomalies of the kidney and urinary tract (CAKUT). The absence of Isl1 led to ectopic branching of the ureteric bud out from the nephric duct or to the formation of accessory buds, both of which could lead to obstruction of the ureter-bladder junction and consequent hydroureter. The abnormal elongation and poor branching of the ureteric buds were the likely causes of the kidney agenesis or hypoplasia. Furthermore, the lack of Isl1 reduced the expression of Bmp4, a gene implicated in the CAKUT-like phenotype, in the metanephric region before ureteric budding. In conclusion, Isl1 is essential for proper development of the kidney and ureter by repressing the aberrant formation of the ureteric bud. These observations call for further studies to investigate whether Isl1 may be a causative gene for human CAKUT. PMID:23641053

Kaku, Yusuke; Ohmori, Tomoko; Kudo, Kuniko; Fujimura, Sayoko; Suzuki, Kentaro; Evans, Sylvia M.; Kawakami, Yasuhiko

2013-01-01

414

Squamous cell carcinoma in a duplicated renal pelvis.  

PubMed

We report an extremely rare case of squamous cell carcinoma (SCC) of the renal pelvis associated with an incompletely duplicated renal pelvis and ureter. A 71-year-old woman presented with left lower back pain and gross hematuria. Urinary cytology showed atypical squamous cells. Computed tomography, magnetic resonance imaging and retrograde pyelography revealed left incompletely duplicated renal pelvis and ureter and a mass in the left upper renal pelvis. A clinical diagnosis of left renal pelvic cancer was made and the patient underwent total nephroureterectomy. Histological examination of the resected specimen revealed SCC with marked keratinization in the upper renal pelvis. The tumor had invaded the renal parenchyma and perinephric fat. There was no urothelial carcinoma component. The pathological stage was pT4 N0. There was no evidence of recurrence 6 months postoperatively. Because the prognosis of SCC of the upper urinary tract is poor, urologists and pathologists should be aware that SCC may develop in duplicated urinary systems. PMID:25550838

Ogawa, Makiko; Morikawa, Teppei; Toyoshima, Toyoaki; Fukayama, Masashi

2014-01-01

415

Two Novel EGFP Insertion Alleles Reveal Unique Aspects of Pax2 Function in Embryonic and Adult Kidneys  

PubMed Central

The Pax2 gene encodes a DNA binding protein with multiple functions in the developing intermediate mesoderm and urogenital tract. Loss of Pax2 in mice results in the complete absence of kidneys, ureters, and sex specific epithelial structures derived from the intermediate mesoderm in both males and females. In this report, we describe two new alleles of Pax2 created by inserting the Enhanced Green Fluorescent Protein coding region into the 5? untranslated leader sequence. One allele is a hypomorph that generates less protein and exhibits structural defects in kidneys and ureters upon homozygosity. A second allele is a true null that can be used to image Pax2 expressing cells in a mutant background. Organ culture and embryo analyses point to a loss of epithelial cell polarity and increased mobility in cells that have deleted Pax2 function. These experiments provide new insight into the role of Pax2 protein levels in determining correct renal architecture and cell fate. These new Pax2 alleles are valuable genetic reagents for in vivo studies of urogenital development. PMID:22410172

Soofi, Abdul; Levitan, Inna; Dressler, Gregory R.

2012-01-01

416

A review of ureteral injuries after external trauma  

PubMed Central

Introduction Ureteral trauma is rare, accounting for less than 1% of all urologic traumas. However, a missed ureteral injury can result in significant morbidity and mortality. The purpose of this article is to review the literature since 1961 with the primary objective to present the largest medical literature review, to date, regarding ureteral trauma. Several anatomic and physiologic considerations are paramount regarding ureteral injuries management. Literature review Eighty-one articles pertaining to traumatic ureteral injuries were reviewed. Data from these studies were compiled and analyzed. The majority of the study population was young males. The proximal ureter was the most frequently injured portion. Associated injuries were present in 90.4% of patients. Admission urinalysis demonstrated hematuria in only 44.4% patients. Intravenous ureterogram (IVU) failed to diagnose ureteral injuries either upon admission or in the operating room in 42.8% of cases. Ureteroureterostomy, with or without indwelling stent, was the surgical procedure of choice for both trauma surgeons and urologists (59%). Complications occurred in 36.2% of cases. The mortality rate was 17%. Conclusion The mechanism for ureteral injuries in adults is more commonly penetrating than blunt. The upper third of the ureter is more often injured than the middle and lower thirds. Associated injuries are frequently present. CT scan and retrograde pyelography accurately identify ureteral injuries when performed together. Ureteroureterostomy, with or without indwelling stent, is the surgical procedure of choice of both trauma surgeons and urologists alike. Delay in diagnosis is correlated with a poor prognosis. PMID:20128905

2010-01-01

417

OCT-aided anastomosis platform study in the rodent model  

NASA Astrophysics Data System (ADS)

Anastomosis is one of the most commonly performed procedure in the clinical environment that involves tubular structures, such as blood vessel, lymphatic vessel, seminal duct and ureter. Suture based anastomosis is still the foundation for most basic surgical training and clinical operation, although alternate techniques have been developed and under development. For those tubular-structure-anastomosis, immediate real-time post-operative evaluation of the surgical outcome is critical to the success of surgery. Previously evaluation is mostly based on surgeons' experience. Fourier-domain optical coherence tomography is high-speed, high-resolution noninvasive 3D imaging modality that has been widely used in the biomedical research and clinical study. In this study we used Fourier-domain optical coherence tomography as an evaluation tool for anastomosis of lymphatic vessels, ureter and seminal duct in rodent model. Immediate post-operative and long term surgical site data were collected and analyzed. Critical clinical parameters such as lumen patency, anastomosed site narrowing and suture error detection are provided to surgeons.

Huang, Yong; Tong, Dedi; Zhu, Shan; Wu, Lehao; Ibrahim, Zuhaib; Lee, WP Andrew; Brandacher, Gerald; Kang, Jin U.

2014-02-01

418

Progesterone--specific binding sites in the kidney of the female baboon  

SciTech Connect

The uptake and retention of a radiolabeled synthetic progestin, ORG 2058, was studied in the urinary tract of the female baboon. Four estrogen-primed baboons were injected intravenously with 2.5 micrograms./kg. body weight of 3H-ORG 2058. One animal, which served as a control, received an additional injection of 2.5 mg./kg. body weight of unlabeled progesterone. One hour after the injections, the animals were killed and the kidneys, ureters and urinary bladder were removed and processed for autoradiography. Localization of progestin was observed in the nuclei of the convoluted and straight segments of the distal tubule, the ascending thick limb of the loop of Henle and both cortical and medullary collecting tubules. Connective tissue cells were also labeled in the medulla and cortex of the kidney. An absence of silver grains was noted in the renal corpuscle, all segments of the proximal tubule and the thin loop of Henle. Concentration of the tritiated steroid was not observed in either the ureter or bladder or in any portions of the urinary tract of the control animal. This study suggests that progesterone has a direct effect via a progesterone specific receptor on the various target cells that sequestered the 3H-ORG 2058.

Weaker, F.J.; Herbert, D.C.; Sheridan, P.J.

1984-10-01

419

Pseudotumoral tuberculous ureteritis: a case report  

PubMed Central

Introduction Tuberculosis is still endemic in Morocco and the urogenital form is common. This form is characterized by clinical polymorphism. However, the isolated ureteric form is very rare. The differential diagnosis might be raised in tumoral cases while undertaking surgical excision which is the realistic choice. Hence, we report an isolated ureteric tuberculosis case, and we discuss the clinical, imaging, diagnostic and therapeutical features. Case presentation A 30-year-old Moroccan man consulted us for left back pain associated with urinary frequency and a few macroscopic episodes of hematuria for the past six months. A computed tomography urography revealed a left hydronephrosis and hydroureter secondary to focal wall thickening of the left lumbar ureter. Hence, we had diagnosed a ureteral tumor. However, a clinical examination showed irritative voiding symptoms and epididymal disorders associated with prostate infection suggesting a Koch’s bacillus assessment of the patient’s urine of which the results proved strongly positive. The treatment consisted of establishing a double-J ureteric stent to drain the left kidney, followed by antituberculous antibiotics. Conclusion Urogenital tuberculosis is common in endemic countries, however isolated ureter affection is rare. It is important to consider a ureteral tuberculosis diagnosis whenever ureteral thickening is revealed in a patient living in a country in which tuberculosis is endemic. PMID:23414595

2013-01-01

420

Management of iatrogenic ureteral injury.  

PubMed

Iatrogenic injury to the ureter is a potentially devastating complication of modern surgery. The ureters are most often injured in gynecologic, colorectal, and vascular pelvic surgery. There is also potential for considerable ureteral injury during endoscopic procedures for ureteric pathology such as tumor or lithiasis. While maneuvers such as perioperative stenting have been touted as a means to avoid ureteral injury, these techniques have not been adopted universally, and the available literature does not make a case for their routine use. Distal ureteral injuries are best managed with ureteroneocystostomy with or without a vesico-psoas hitch. Mid-ureteral and proximal ureteral injuries can potentially be managed with ureteroureterostomy. If the distal segment is unsuitable for anastomosis then a number of techniques are available for repair including a Boari tubularized bladder flap, transureteroureterostomy, or renal autotransplantation. In rare cases renal autotransplantation or ureteral substitution with gastrointestinal segments may be warranted to re-establish urinary tract continuity. Laparoscopic and minimally invasive techniques have been employed to remedy iatrogenic ureteral injuries. PMID:24883109

Burks, Frank N; Santucci, Richard A

2014-06-01

421

Long-term effects of pediatric extracorporeal shockwave lithotripsy on renal function  

PubMed Central

Introduction Extracorporeal shock wave lithotripsy (ESWL) is a well-known and successful treatment modality. In addition, it can be used in premature infants. ESWL is used to treat kidney and ureter stones in children. However, although it is a preferred noninvasive treatment in that setting, there is debate about its long-term effects on growing kidneys in children. Objectives To investigate the long-term effects of pediatric ESWL on renal function in light of updated literature. Methods PubMed and Medline were searched for studies on ESWL in a pediatric population with keywords including efficacy, child, kidney calculi, ureter calculi, lithotripsy, injury, vascular trauma, and shock waves. The research was limited to the English literature during a period from 1980 to 2014. In total, 3,000 articles were evaluated, but only 151 papers were considered. Only the manuscripts directly related to the reviewed subjects were included in the current study. Results However, the acute effects of ESWL in kidney are well-described. Although there are limited studies on the long-term effects of ESWL in children, there is a widespread opinion that ESWL is not affecting renal functions in the long-term. Conclusion ESWL is a safe, effective, and noninvasive treatment option in children. Although ESWL can cause some acute effects in the kidney, there is no long-term effect on the growing kidneys of children. PMID:24892029

Akin, Yigit; Yucel, Selcuk

2014-01-01

422

Preoperative evaluation of living kidney donors using multirow detector computed tomography: comparison with digital subtraction angiography and intraoperative findings.  

PubMed

To assess the accuracy of multirow detector computed tomography (MDCT) for the evaluation of renal anatomy for preoperative donor assessment in living related kidney transplantation. MDCT-scans (4- and 16-slice-CT) of 51 consecutive living kidney donors (age, 51.6 +/- 9.7 years; range, 28-68 years) were analysed by three blinded observers and compared with digital subtraction angiography (DSA) and surgery. Contrast-enhanced MDCT was performed with 1 mm slice thickness reconstruction interval during arterial and venous phases. Supernumerary renal arteries, veins, early branching of vessels and abnormalities of the ureters were documented. The overall accuracy of computed tomography angiography (CTA) for detection and classification of surgically relevant arterial variants was 97% (99/102). The interpretation of 16-channel MDCT images was correct in all cases (accuracy, 100%), while the four-channel CTA had three incorrect results regarding the differentiation of early branching vessels from double renal arteries (accuracy, 93%). The overall accuracy of DSA was 91%. Renal vein abnormalities were correctly diagnosed with MDCT in 100% compared with 89% correct findings with DSA. There were three kidneys with incomplete ureter duplication, detected both with MDCT and DSA. MDCT demonstrated superior accuracy compared with non-selective DSA for the preoperative assessment of renal anatomy in living kidney donors; and for the distinction of supernumerary arteries versus early branching patterns, 16-channel CTA data were better than those of the four-channel system. PMID:16162099

Hänninen, Enrique Lopez; Denecke, Timm; Stelter, Lars; Pech, Maciej; Podrabsky, Petr; Pratschke, Johann; Ricke, Jens; Schindler, Ralf; Neuhaus, Peter; Felix, Ronald; Tullius, Stefan G; Tullius, Stefen G

2005-10-01

423

Management of iatrogenic ureteral injury  

PubMed Central

Iatrogenic injury to the ureter is a potentially devastating complication of modern surgery. The ureters are most often injured in gynecologic, colorectal, and vascular pelvic surgery. There is also potential for considerable ureteral injury during endoscopic procedures for ureteric pathology such as tumor or lithiasis. While maneuvers such as perioperative stenting have been touted as a means to avoid ureteral injury, these techniques have not been adopted universally, and the available literature does not make a case for their routine use. Distal ureteral injuries are best managed with ureteroneocystostomy with or without a vesico-psoas hitch. Mid-ureteral and proximal ureteral injuries can potentially be managed with ureteroureterostomy. If the distal segment is unsuitable for anastomosis then a number of techniques are available for repair including a Boari tubularized bladder flap, transureteroureterostomy, or renal autotransplantation. In rare cases renal autotransplantation or ureteral substitution with gastrointestinal segments may be warranted to re-establish urinary tract continuity. Laparoscopic and minimally invasive techniques have been employed to remedy iatrogenic ureteral injuries. PMID:24883109

Burks, Frank N.

2014-01-01

424

Morphological analysis of rat ureteric terminal arterioles in situ.  

PubMed

Confocal imaging of Fluo-4, Propidium iodide, and di-8-Anepps loaded ureter were used to study the morphology of terminal arterioles with an inner diameter <50 ?m in intact rat ureter. Optical sectioning showed that the muscle coat of the terminal arterioles consisted of a monolayer of highly curved smooth muscle cells which run circumferentially around the endothelium. This technique allowed not only to measure the inner diameter of the terminal arterioles but also to define the orientation and number of revolutions an individual smooth muscle cell made around the endothelium. We measured thickness, width, length, and morphological profile of the myocytes and endothelial cells. Propidium iodide staining showed nuclei of individual cells by continuous imaging at high resolution in serial optical sections. Conventional haematoxylin-eosin, Masson's tri-chrome staining, and transmission electron microscopy were also used in this study to compare the measurements obtained from live confocal imaging with histological standard methods. Parameters obtained from live imaging were significantly different. This technique of live staining allowed measuring the cellular and nuclear dimensions of the terminal arterioles in their natural environment which are important in studying the effects of vascular disease or aging on vascular structure. PMID:23450700

Mumtaz, Sadaf

2013-06-01

425

Spontaneous Ureteral Rupture Diagnosis and Treatment  

PubMed Central

Rupture of the urinary collecting system associated with perinephric or retroperitoneal extravasation of the urine is an unusual condition and it is commonly associated with renal obstructing disease. Perforation could occur at any level from the calix to the bladder but it is usually seen at the fornices and upper ureter. It may lead to several serious consequences including urinoma, abscess formation, urosepsis, infection, and subsequent irreversible renal impairment. We report a case of a 69-year-old woman who presented at the emergency department of our institution with severe abdominal pain. Due to symptomatology worsening, complete laboratory evaluation was performed and the patient underwent abdominal contrast enhanced computed tomography (CT) evaluation which showed contrast agent extravasation outside the excretory system without any evidence of renal calculi at basal acquisition. It was decided to perform a double-J stent placement which was followed by complete healing of the ureter and its removal was performed 8 weeks later. Diagnosis and therapeutic approaches are discussed. PMID:24455381

Pampana, E.; Altobelli, S.; Morini, M.; Ricci, A.; D'Onofrio, S.; Simonetti, G.

2013-01-01

426

Combined endoscopic surgery in the prone-split leg position for successful single-session removal of an encrusted ureteral stent: a case report  

PubMed Central

Introduction Although encrusted stents may lead to some unwanted complications including urinary tract obstruction, urinary sepsis, and potential loss of kidney function, there is currently no consensus on the most efficient method for managing stents that are intentionally left in situ. This is the first report describing the management of an encrusted stent using combined endoscopic surgery in the prone split-leg position in a single session. Case presentation A 47-year-old Asian man presented with left flank pain and macrohematuria. The patient had undergone left ureteral stenting three years previously for the treatment of left ureteral stones and hydronephrosis; however, he was lost to follow-up before the treatment for the ureter stones was completed. Therefore, the ureteral stent and stones were not removed. An abdominal radiograph and a noncontrast computed tomography scan showed encrustation along the retained stent with stone burdens in the kidney and ureter. The ureteral stent could not be removed by cystoscopy after shock wave lithotripsy of the left ureteral stones. Therefore, endoscopic lithotripsy combined with flexible ureteroscopy and miniature nephroscopy was performed with the patient in the prone split-leg position. All the stones and the encrusted ureteral stent were successfully removed in a single session. Conclusions In this case, percutaneous nephrolithomy in addition to flexible ureteroscopy was preferred because severe encrustation of the proximal stent and ureteral stones complicated the therapeutic strategy. Combined endoscopic techniques in the prone split-leg position can achieve successful and safe management of encrusted stents. PMID:24742133

2014-01-01

427

Considerations in Minimally Invasive Surgery for Renal and Ureteric Calculi: A Bicenter Quality Control Study  

PubMed Central

Background The use of minimally invasive surgery is increasing. Evaluating the quality of care brings new sights in the optimization of operating techniques. Methods We included all procedures performed in two hospitals during 2010 and 2011. A total of 264 patients were included in the ureterorenoscopy (URS) group and 77 patients in the percutaneous nephrolitholapaxy (PCNL) group. Data were gathered by retrospectively reviewing medical records. Results Mean stone diameter in the URS group was 9 mm. Patients suffered from a single stone in 79% of the cases. Calculi in the distal ureter, defined as the part of the ureter below the lower border of the sacroiliac joint, were most likely to be removed. A stone-free status was reached in 69% of the cases using URS. Mean stone diameter in the PCNL group was 23 mm. PCNL was successful in 70% of the cases in Haga Hospital versus 53% in Medisch Centrum Haaglanden. Incidence of complications was comparable between the hospitals (p = 0.5). Outcome and quality of both PCNL and URS was not influenced by sex, age or body mass index. Conclusion The clinical results were comparable with results in the literature. Further improvement can be made by optimization of technical aspects and centralization of treatment by urologists experienced in minimally invasive techniques. PMID:24917772

Weltings, Saskia; Roshani, Hossain; Leenarts, Joost; Pelger, Rob

2014-01-01

428

Radioanatomy of the retroperitoneal space.  

PubMed

The retroperitoneum is a space situated behind the parietal peritoneum and in front of the transversalis fascia. It contains further spaces that are separated by the fasciae, between which communication is possible with both the peritoneal cavity and the pelvis, according to the theory of interfascial spread. The perirenal space has the shape of an inverted cone and contains the kidneys, adrenal glands, and related vasculature. It is delineated by the anterior and posterior renal fasciae, which surround the ureter and allow communication towards the pelvis. At the upper right pole, the perirenal space connects to the retrohepatic space at the bare area of the liver. There is communication between these two spaces through the Kneeland channel. The anterior pararenal space contains the duodenum, pancreas, and the ascending and descending colon. There is free communication within this space, and towards the mesenteries along the vessels. The posterior pararenal space, which contains fat, communicates with the preperitoneal space at the anterior surface of the abdomen between the peritoneum and the transversalis fascia, and allows communication with the contralateral posterior pararenal space. This space follows the length of the ureter to the pelvis, which explains the communication between these areas and the length of the pelvic fasciae. PMID:25547251

Coffin, A; Boulay-Coletta, I; Sebbag-Sfez, D; Zins, M

2015-02-01

429

The Role of Ureteral Relaxation in the Promotion of Stone Passage  

NASA Astrophysics Data System (ADS)

In order to promote stone passage in renal colic, we must first understand normal ureteral activity and how this is affected by the presence of a stone. Measuring normal ureteral activity in humans is difficult without the use of invasive methods or techniques which in themselves may affect peristalsis. Monitoring the activity during confirmed renal colic is even more difficult and virtually impossible. Both animal and human studies have therefore been used in an attempt to understand the physiology of the ureter and how this is affected by the presence of a stone. Using this knowledge, drugs can be used to alter the behavior of the ureter in an attempt to promote stone passage. Peristalsis has always been thought to be essential to allow stone passage and therefore it has been necessary to determine whether stone passage occurs by promotion of ureteral activity or by smooth muscle relaxation. Research indicates that drugs which allow continued peristalsis whilst preventing the increased uncoordinated activity seen in renal colic would be the most advantageous. The alpha-1A-adrenoceptor antagonists are the most effective drugs to date.

Davenport, Kim; Timoney, Anthony G.; Keeley, Francis X.

2007-04-01

430

Modified laparoscopic intravesical nonrefluxing ureteral reimplantation with psoas hitch using a submucosal tunneling  

PubMed Central

We aimed to study the safety and efficacy of the cystoscopy-assisted nonrefluxing ureteral reimplantation technique using submucosal tunneling during laparoscopic ureteroneocystostomy (UNC) with a psoas hitch in patients with distal ureter stricture after gynecologic surgery. We reviewed six female patients who underwent gynecological surgeries. All patients showed persistent postoperative distal ureter stricture or obstruction. These patients underwent laparoscopic nonrefluxing UNC with a psoas hitch using a submucosal tunneling technique combined with cystoscopy at our institute. They had corrective surgery at an average of 13.3 weeks after ureteral injury. The short-term success was confirmed either by voiding cystourethrography (VCU) or by diuretic isotope renal scan (MAG-3) conducted 3 months after the operation. None of the patients showed evidence of postoperative stricture at the reimplanted site and reflux on either MAG-3 renal scan or VCU. None of the patients showed major or minor complications during follow-up. It is safe and feasible to perform the laparoscopic nonrefluxing UNC with a psoas hitch using a submucosal tunneling technique combined with cystoscopy for ureteral stricture. PMID:25610823

Kim, Chang-Hee; Ro, Joo Hwan; Jung, Han

2014-01-01

431

Cellular Accumulation of L-Cystine in Rat Kidney Cortex In Vivo  

PubMed Central

Cellular accumulation of L-cystine in rat kidney cortex in vivo has been studied using L-[35S]cystine. The L-[35S]cystine radioactivity in plasma decreases to less than 10% of the initially calculated value by 15 min. Four 35S-containing intracellular products of L-cystine metabolism were identified including cystine, cysteine, reduced glutathione, and an as yet unidentified compound. The latter is probably taurine, cysteinesulphinate, or cysteic acid. Cellular accumulation of these products was found to be more rapid in vivo than in vitro. Cellular accumulation of the products of L-cystine metabolism was found to be essentially unchanged in the presence of ureter ligation. Unlabeled L-lysine administered simultaneously with L-[35S]cystine, in both the presence and absence or ureter ligation, enhanced the cellular accumulation of intracellular metabolic products of L-[35S]cystine. Simultaneous 35S cellular accumulation and L-cystine clearance studies were performed both in the presence and absence of L-lysine. L-Lysine enhanced cellular accumulation of 35S-products despite an accompanying increase in L-cystine clearance. The results are interpreted as evidence for a dissociation between cellular accumulation and transepithelial transport. This evidence for independent luminal transport and peritubular cellular accumulation could explain the apparent paradox in the disease cystinuria where there appears to be a luminal transport defect for L-cystine, but no defect for cellular accumulation of L-cystine metabolic products in vitro. PMID:4683883

Greth, Warren E.; Their, Samuel O.; Segal, Stanton

1973-01-01

432

Urinary system birth defects in surgically treated infants in Sarajevo region of Bosnia and Herzegovina.  

PubMed

Congenital anomalies of the urinary system are relatively common anomalies. In Bosnia and Herzegovina there is no existent unique evidence of congenital anomalies and registries. The aim of this study was to obtain the frequency of different urinary tract anomalies types and their sex distribution among cases hospitalized in the Department of Pediatric Surgery of the University of Sarajevo Clinics Centre, Bosnia and Herzegovina, during the period from January 2002 to December 2006. Retrospective study was carried out on the basis of clinical records. Standard methods of descriptive statistics were performed for the data analysis. Among 289 patients that were surgically treated 62,37% of the patients were male patients, while 37,63% were female patients. Twenty nine different urinary system anomalies types were found in this study. These were: vesicoureteral reflux (99 cases or 30,75%), hypospadias (62 cases or 19,26%), pelviureteric junction obstruction (42 cases or 13,04%), megaureter (35 cases or 10,87%), duplex pelvis and ureter (16 cases or 4,97%), bladder diverticulum (8 cases or 2,48%), ureterocoele (7 cases or 2,17%), stenosis of the external urethral opening (6 cases or 1,86%), ectopic kidney, duplex kidney and pelvis (each 5 cases or 1,55%), polycystic kidneys and urethral stricture (each 4 cases or 1,24%), multicystic kidney (3 cases or 0,93%), kidney agenesis, ureter agenesis, urethral diverticulum, ectopic ureter, horseshoe kidney and fetal kidney (each 2 cases or 0,62%), renal aplasia, urethral atresia, renal cyst, urachal cyst, epispadias, bladder exstrophy, renal hypoplasia, renal malrotation and Prune-Belly syndrome (each 1 case or 0,31%). According to this study, urinary tract anomalies were more common in male than in female patients (62,37%). Generally, the most frequent anomaly type was vesicoureteral reflux in total number of 99 cases, and in females (66 cases), but hypospadias was the most common anomaly in males (62 cases). The anomalies of other systems associated with urinary system anomalies were found in ten cases. These were: cryptorchidism, congenital inguinal hernia, open inner inguinal ring, uterus bicornis unicollis and one case of multiple anomalies. PMID:18498261

Alicelebi?, Selma; Kapi?, Dina; Mornjakovi?, Zakira

2008-05-01

433

Characterization of nitric oxide synthase activity in sheep urinary tract: functional implications.  

PubMed

1. To define further the role of nitric oxide (NO) in urinary tract function, we have measured the presence of nitric oxide synthase (NOS) activity, and its relationship with functional NO-mediated responses to electrical field stimulation (EFS) in the urethra, the detrusor and the ureter from sheep. NOS activity was assayed by the conversion of L-[14C]-arginine to L-[14C]-citrulline. Endogenous production of citrulline was confirmed by thin layer chromatography. 2. NOS enzymatic activity was detected in the cytosolic fraction from tissue homogenates with the following regional distribution (pmol citrulline mg-1 protein min-1): urethra (33 +/- 3.3), detrusor (13.1 +/- 1.1) and ureter (1.5 +/- 0.2). No activity was detected in the particulate fraction of any region. 3. NOS activity was dependent on Ca(2+)-calmodulin and required exogenously added NADPH and tetrahydrobyoptein (BH4) for maximal activity. Exclusion of calmodulin from the incubation mixture did not modify NOS activity, but it was significantly reduced in the presence of the calmodulin antagonist, calmidazolium, suggesting the presence of enough endogenous calmodulin to sustain the observed NOS activity. 4. NOS activity was inhibited to a greater extent by NG-nitro-L-arginine (L-NOARG) and its methyl ester (L-NAME) than by NG-monomethyl-L-arginine (L-NMMA), while 7-nitroindazole (7-NI) was a weak inhibitor and L-cannavine had no effect. 5. Citrulline formation could be inhibited by superoxide dismutase in an oxyhaemoglobin-sensitive manner, suggesting feedback inhibition of NOS by NO. 6. EFS induced prominent NO-mediated relaxations in the urethra while minor or no responses were observed in the detrusor and the ureter, respectively. Urethral relaxations to EFS were inhibited by NOS inhibitors with the rank order of potency: L-NOARG = L-NAME > 7-NI > L-NMMA. 7. In conclusion, we have demonstrated the presence of NO-synthesizing enzymatic activity in the sheep urinary tract which shows similar characteristics to the constitutive NOS isoform found in brain. We suggest that the enzymatic activity measured in the urethral muscle layer may account for the NO-mediated urethral relaxation during micturition whereas regulation of detrusor and ureteral motor function by NOS containing nerves is less likely. PMID:8799561

García-Pascual, A; Costa, G; Labadia, A; Persson, K; Triguero, D

1996-06-01

434

Hormonal Treatment for Severe Hydronephrosis Caused by Bladder Endometriosis  

PubMed Central

The incidence of endometriosis cases involving the urinary system has recently increased, and the bladder is a specific zone where endometriosis is most commonly seen in the urinary system. In the case presented here, a patient presented to the emergency department with the complaint of side pain and was examined and diagnosed with severe hydronephrosis and bladder endometriosis was determined in the etiology. After the patient was pathologically diagnosed, Levonorgestrel-Releasing Intrauterine System (LNG-IUS) was administered to the uterine cavity. At the 12-month follow-up, endometriosis was not observed in the cystoscopy and symptoms had completely regressed. Hydronephrosis may be observed after exposure of the ureter, and silent renal function loss may develop in patients suffering from endometriosis with bladder involvement. For patients with moderate or severe hydronephrosis associated with bladder endometriosis, LNG-IUS application may be separately and successfully used after conservative surgery. PMID:25506035

Efe, Erkan; Serin, Salih; Kolus, Eyüp; Ercan, Önder; Resim, Sefa

2014-01-01

435

Laser induced shock wave lithotripsy--biologic effects of nanosecond pulses  

SciTech Connect

Laser energy of a Nd-YAG laser (1064 nm. wave length, 8 nsec pulse duration) was directed against various tissue cultures and the urothelium of the ureter, bladder and kidney parenchyma in pigs. Single pulse energy was 50 to 120 mJ with a repetition rate of 20 Hz. Urothelium and kidney parenchyma were irradiated in seven pigs. Tissue samples were examined histologically and electron microscopically directly, two, four, eight and 12 days after irradiation. No macroscopic lesion could be found. Maximum energy caused a small rupture cone of 40 micron. depth. No thermic effects or necrosis resulted, so that no harm is to be expected with unintentional irradiation during laser stone disintegration.

Hofmann, R.; Hartung, R.; Geissdoerfer, K.A.; Ascherl, R.; Erhardt, W.; Schmidt-Kloiber, H.; Reichel, E.

1988-05-01

436

[Pyonephrosis due to xanthine stones in a bitch treated with allopurinol].  

PubMed

A 2-year-old, neutered, crossbreed bitch was presented as an emergency with painful abdomen, fever and vomiting. The cause of the acute abdomen was a pyonephrosis of the left kidney, caused by four xanthine stones, which had blocked the ureter. After surgical removal of the heavily altered left kidney, the bitch recovered rapidly. Because of a leishmaniasis the bitch had been treated with allopurinol over an extended period, the xanthine stone formation is likely to have resulted from allopurinol usage. Because there were additionally small concrements in the right kidney, the medication was stopped. Subsequently, the dog has received a low purine diet, and the leishmaniasis titer and renal function have been monitored regularly. PMID:24518947

Maier, R; Lutter, F X; Lohss-Baumgärtner, E

2014-01-01

437

Urinothorax—An Underdiagnosed Cause of Acute Dyspnea: Report of a Bilateral and of an Ipsilateral Urinothorax Case  

PubMed Central

Urinothorax (UT) is a rare and often undiagnosed condition, defined as the presence of urine in the pleural cavity due to the retroperitoneal leakage of urine accumulation, known as urinoma, into the pleural space. UT usually is a transudative pleural effusion that presents in patients with obstructive uropathy and it may occur following surgical procedures in the ureter or kidney such as ESWL, PCNL, and URS. Its diagnosis requires a high degree of clinical suspicion since the respiratory symptoms tend to be absent or mild and the urological signs tend to dominate. However, UT may rarely present with severe and acute dyspnea as well. The objectives of this study are to describe two new cases of this rare entity, a bilateral case and an ipsilateral case focusing on the side that occurs according to the affected renal insult, and to alert the physicians to include UT in their differential diagnosis of pleural effusions especially in patients with recent urinary tract disorders. PMID:23326713

Laskaridis, Leonidas; Kampantais, Spyridon; Toutziaris, Chrysovalantis; Chachopoulos, Basileios; Perdikis, Ioannis; Tahmatzopoulos, Anastasios; Dimitriadis, Georgios

2012-01-01

438

Comprehensive renal scintillation procedures in spinal cord injury: comparison with excretory urography  

SciTech Connect

A /sup 131/iodine orthoiodohippurate comprehensive renal scintillation procedure was performed and compared to results of excretory urography in 200 spinal cord injury patients. No severe urographic abnormalities were undetected by the comprehensive renal scintillation procedure. Only 1.4 per cent of renal units had greater than minimal pyelocaliectasis or ureterectasis in the presence of a normal radionuclide examination. A relatively large number of abnormalities were detected on the renal scintillation procedure when the excretory urogram was normal. Serial followup will be required to determine the significance of these findings but present data suggest that a comprehensive renal scintillation procedure and a plain film of the kidneys, ureters and bladder may be used for screening upper urinary tract abnormalities in lieu of an excretory urogram. This is particularly advantageous for the spinal cord injury population, since there have been no toxic or allergic reactions reported, no bowel preparation or dehydration is required and there is relatively low radiation exposure.

Lloyd, L.K.; Dubovsky, E.V.; Bueschen, A.J.; Witten, D.M.; Scott, J.W.; Kuhlemeier, K.; Stover, S.L.

1981-07-01

439

Reflex anuria: a rare cause of acute kidney injury  

PubMed Central

Background Acute Kidney Injury results from pre renal, post renal or intrinsic renal causes. Reflex anuria is a very rare cause of renal impairment which happens due to irritation or trauma to one kidney or ureter, or severely painful stimuli to other nearby organs. Case Presentation Here we present a case of acute kidney injury secondary to reflex anuria in a patient who underwent extensive gynecological surgery along with ureteral manipulation which recovered spontaneously. Conclusion Reflex Anuria is a rare and often not considered as cause of acute kidney injury. This case illustrates that this should be kept as a differential in potential cause of acute kidney injury in patient undergoing urogenital or gynecological surgeries. PMID:24765255

Adediran, Samuel; Dhakarwal, Pradeep

2014-01-01

440

Successful Removal of an Intravesical Electrical Wire Cable  

PubMed Central

A few previous reports have described cases wherein electrical wire cables were inserted into the male urethra and bladder. Electrical wire cables are available at home and are easy to insert. However, after they coil in the patient's bladder, they are difficult to remove. In February 2013, a 30-year-old man presented to the emergency room of SMG-SNU Boramae Medical Center with a urethral foreign body. He had inserted an electrical wire cable into his urethra for the purpose of masturbation, despite having a regular sex partner and no underlying disease. A kidney-ureter-bladder radiography showed a tangled wire in his bladder and urethra. On the next day, we tried to remove the wire cystoscopically, but this proved to be impossible because of complex coiling and the slippery surface of the wire. A Pfannenstiel incision was made to remove the foreign body. No postoperative complications were noted. PMID:25237664

Ahn, Hyunsoo

2014-01-01

441

Successful removal of an intravesical electrical wire cable.  

PubMed

A few previous reports have described cases wherein electrical wire cables were inserted into the male urethra and bladder. Electrical wire cables are available at home and are easy to insert. However, after they coil in the patient's bladder, they are difficult to remove. In February 2013, a 30-year-old man presented to the emergency room of SMG-SNU Boramae Medical Center with a urethral foreign body. He had inserted an electrical wire cable into his urethra for the purpose of masturbation, despite having a regular sex partner and no underlying disease. A kidney-ureter-bladder radiography showed a tangled wire in his bladder and urethra. On the next day, we tried to remove the wire cystoscopically, but this proved to be impossible because of complex coiling and the slippery surface of the wire. A Pfannenstiel incision was made to remove the foreign body. No postoperative complications were noted. PMID:25237664

Ahn, Hyunsoo; Son, Hwancheol

2014-08-01

442

Update on Vesicoureteral Reflux: Pathogenesis, Nephropathy, and Management  

PubMed Central

Clinical reflux was first visualized over 100 years ago. In the 1950s and early 1960s, the assumption was that surgery to relieve bladder neck obstruction would have a positive effect on bladder function and reflux. By the early 1970s it was understood that the underlying structural problems leading to primary reflux were congenitally abnormal distal ureters and orifices. Researchers in the 1960s and 1970s demonstrated the connection between reflux and renal scarring. More recently, reflux nephropathy in the absence of urinary tract infections has been observed, leading researchers to investigate an association between bladder dysfunction and reflux with resulting nephropathy. The cornerstone of management of the child with vesicoureteral reflux is antibiotic prophylaxis; treatment regimens for various grades of reflux are reviewed. Indications for surgical treatment of reflux are also discussed. Controversies regarding vesicoureteral reflux, including duration of prophylactic treatment, remain to be resolved. PMID:16985715

Decter, Ross M

2001-01-01

443

Bilateral botryoid nephroblastoma: a rare cause of renal failure  

PubMed Central

The authors describe the case of a 16-month-old girl who presented with bilateral hydronephrosis and renal failure secondary to bilateral renal pelvic botryoid Wilms’ tumour (nephroblastoma). The term ‘botryoid’ describes an intrapelvic polypoid renal Wilms tumour, either extending from the renal parenchyma or primarily pelvis-based tumour. Both tumours filled the renal pelvis and extended down the proximal ureter, with no intraparenchymal tumour seen. Bilateral intralobar nephrogenic rests were present. Histological examination demonstrated triphasic nephroblastoma, with focal rhabdomyomatous differentiation of the stromal element bilaterally. Postchemotherapy, the patient underwent bilateral nephrectomy. Post complete resection of her bilateral disease, this patient has had an excellent outcome. This is only the third reported case of bilateral botryoid Wilms’ tumour. While the condition is extremely rare, it should be included in the differential diagnosis of a young child with bilateral renal pelvic masses. PMID:22962373

Conlon, Niamh; Teoh, Chia Wei; Pears, Jane; O’Sullivan, Maureen

2012-01-01

444

A new approach in radionuclide imaging to ureteric peristalsis using 99Tcm-MAG 3 and condensed images.  

PubMed

A new method for the evaluation of ureteric peristalsis is described. Standard, dynamic renal scintigraphy was carried out using 99Tcm-MAG 3 in 59 patients. Time-activity curves and condensed images over the ureter area were created simultaneously. A six-grade scale (O-V) was chosen for the classification of ureteral function. The results obtained were compared with parameters of renographic curves and other clinical findings. In a group of 13 patients, two different renal radiopharmaceuticals were used: 131I-OIH and 99Tcm-DTPA. The results show that the new method is suitable for the assessment of ureteral disorders, and has some advantages compared with previously described methods. 99Tcm-MAG 3, with a better target-to-background ratio compared to 131I-OIH and 99Tcm-DTPA, is the most suitable radiopharmaceutical for this purpose. PMID:1829799

Lepej, J; Kliment, J; Horák, V; Buchanec, J; Marosová, A; Belákova, S

1991-05-01

445

Pelvic complications after definitive treatment of prostate cancer by interstitial or external beam radiation  

SciTech Connect

Radiation complications, after definitive treatment of localized prostatic carcinoma by either external beam or interstitial implantation with Iodine-125 seeds, are reviewed. Late serious complications to immediately adjacent structures of the anterior rectal wall, prostatic urethra, bladder neck, and external sphincter occurred with similar frequency in both treatment groups. However, late serious complications of the remotely adjacent structures of the bladder, urethra, distal ureters, and circumferential rectal wall occurred more frequently in the external beam treatment series, a reflection of the fact that larger tissue volumes were irradiated. Rectal ulceration, while occurring in both treatment groups, was amenable to surgical correction or underwent spontaneous healing only in the 125I group. At this point in our experience, morbidity from late radiation complications has been less among those patients having interstitial implantation for definitive treatment of localized prostatic carcinoma.

Schellhammer, P.F.; El-Mahdi, A.M.

1983-05-01

446

Label-free Au cluster used for in vivo 2D and 3D computed tomography of murine kidneys.  

PubMed

Kidney disease is a worldwide health hazard. Noninvasive imaging modalities such as computed tomography are often used for diagnosis, to guide treatment, and to assess a disease state over the long-term. The physiology of the kidneys can be assessed with contrast agents. We present an albumin-stabilized Au cluster with red fluorescence and robust X-ray attenuation. In vivo studies revealed distribution of the Au clusters in the liver, spleen, and kidneys, with excretion mostly via the kidneys. Under optimal conditions, this agent can outline the anatomy of mouse kidneys on 2D and 3D computed tomography imaging, with clear visualization of the renal collecting system and ureters. This is a promising agent for kidney visualization and disease diagnosis. PMID:25483010

Wang, Yaling; Xu, Chao; Zhai, Jiao; Gao, Fuping; Liu, Ru; Gao, Liang; Zhao, Yuliang; Chai, Zhifang; Gao, Xueyun

2015-01-01

447

A Cause of Renal Dysfunction: A Giant Bladder Stone  

PubMed Central

Bladder stones are frequently seen in elderly men and account for 5% of all urinary stones. They develop secondary to infravesical obstructions, such as prostatic hyperplasia and neurogenic bladder. A 56-year-old patient with frequent and painful urination, dysuria, and minor complaints of suprapubic pain was referred to our clinic. He was diagnosed with bladder stones by non-contrast abdominopelvic computerized tomography, kidney-ureter-bladder radiography, and urinary system ultrasonography. Cystolithotomy was applied on a giant stone measuring 11×6.5×10 cm that filled the intravesical cavity nearly completely. Here, we present this case of a giant bladder stone causing renal dysfunction within the context of findings in the literature. PMID:25610281

Ofluoglu, Yilmaz; Aydin, Hasan Riza; Kocaaslan, Ramazan; Adanur, Senol; Ziypak, Tevfik

2013-01-01

448

Squamous Cell Carcinoma Arising from Abdominal Wall Defect Lesion Complicated with Cloacal Exstrophy  

PubMed Central

Summary: Cloacal exstrophy is an extremely rare congenital complex deformity that is associated with anterior abdominal wall defects, reflex and exposure of the cloaca (uninterrupted ureter and bowel), aproctia, a widely separated pubic bone, and defects or dysplasia of external genital organs. Here, we present the case of a 42-year-old man with squamous cell carcinoma arising from an abdominal wall defect complicated by cloacal exstrophy. He was successfully treated with excision of the skin lesion with the bowel and reconstruction using a pedicled anterolateral thigh flap combined with a tensor fasciae latae flap. To our knowledge, this is the first report of squamous cell carcinoma arising from an abdominal wall defect complicated by cloacal exstrophy.

Yokoo, Satoshi; Takaku, Yuki; Morita, Hiroki; Yasuda, Masato

2015-01-01

449

Primary obstructive megaureter with a giant lower ureteral stone synchronous with ipsilateral staghorn kidney  

PubMed Central

INTRODUCTION Primary obstructive megaureter (POM) is uncommon in adults. Urolithiasis formation may uncover the underlying congenital abnormally of these patients. PRESENTATION OF CASE Herein, we present a 20-year-old man who was admitted with synchronous left renal staghorn and a lower giant ureteral stone. Radiologic evaluations revealed that POM is the underlying cause of the uncommon occurrence of synchronous left reno-ureteral stone formation. DISCUSSION Urinary tract stones are not uncommon in the POM. Although synchronous renal-ureteral unit stones are less common but staghorn-ureteral stones complex are very rare. In such conditions full radiologic work-up is recommended. Based on our literature review, this is the first reported case of staghorn-ureteral stones complex in the setting of adult POM. CONCLUSION In every case with dilated ureter concomitant with ureteral stone or renal stone, the POM should be included in the differential diagnosis. PMID:22889706

Moslemi, Mohammad Kazem

2012-01-01

450

Results of surgical repair of primary obstructive megaureter.  

PubMed

Surgical treatment of primary obstructive megaureter is generally recommended when ureteral dilatation is likely to contribute to symptoms such as pyelonephritis or calculi. The authors' objective for this study was to present the surgical results performing ureteral reimplantation, combined with modified Lich-Gregoir antireflux procedure (using anchoring stitch) over a 10 year period. The average operative time for ureteral reimplantation was 259.64 minutes. The authors' success rate was 92% and all patients had no postoperative ureteral obstruction from intussusception of reimplanted ureter Follow-up postoperative renal sonography at 22 weeks showed a decrease in hydronephrosis in 92%. The authors concluded that the surgical results were comparable with surgical results of other techniques and an anchoring stitch should be considered to prevent postoperative ureteral obstruction from ureteral intussusception. PMID:16696416

Mungnirandr, A; Zeeh, U

2006-03-01

451

[Prenatal diagnostic of congenital unilateral hydronephrosis with megaureter--a case presentation].  

PubMed

Unilateral mild hydronephrosis with ureteral dilatation is a condition that can be detected by careful prenatal ultrasound examination. We present such a case, in a 26 year pregnant woman with hereditary antecedents (mother with Ombredan disease). The fetal ultrasound at 34 weeks indicated a left anechogenic sinuous image, identified as dilated ureter, and connected to a grade 2 hydronephrotic kidney. Normal data regarding the other kidney and the bladder made us recommend a close follow-up, considering this case as with a good prognosis. After birth, reassessment was favourable, and at 1 year follow-up the child was in good condition, and the kidney functional. We conclude that this case is a unilateral congenital megaureter, of probably obstructive origins, with a mild hydronephrosis. A good outcome was suggested by the late diagnostic, unilateral condition, and normal fetal ultrasound description regarding morphology, biometry and amniotic fluid. PMID:17438898

Socolov, R; Stratone, Carmen; Socolov, Demetra

2006-01-01

452

Anterior pelvic reconstruction with ileum after cancer treatment.  

PubMed Central

Ileum has been used to reconstruct the lower urinary tract in 15 patients (10 women, five men) after treatment for bladder or gynaecological cancer. Seven patients had previously received radical pelvic irradiation. Four methods were used: group 1 (five patients): bladder patch after partial cystectomy or bladder augmentation after clam cystotomy for bladder contracture; group 2 (four patients): bladder replacement after subtotal (supratrigonal) cystectomy; group 3 (two patients): ureteric replacement for lower ureteric obstruction or fistula, and group 4 (four patients): complete replacement of bladder and lower ureters after anterior pelvic exenteration, with creation of neovagina from caecum in the two female patients. Review of the results indicates that ileum provides a versatile and safe material for anterior pelvic reconstruction in cancer patients even after previous pelvic irradiation. Images Figure 1. Figure 2. Figure 4. Figure 5. Figure 6. PMID:1774743

Hendry, W F; Christmas, T J; Shepherd, J H

1991-01-01

453

Modern management of stone disease in patients with a solitary kidney  

PubMed Central

Analysing the data available in the literature, contemporary methods of treatment of nephrolithiasis are limited to the methods of minimally invasive percutaneous nephrolithotomy (PCNL) and ureterorenoscopic lithotripsy (URSL), not excluding their use in the presence of developmental abnormalities and kidney impairment only. Minimally invasive methods have become standard procedures. A complement to ineffective URSL and PCNL treatment is extracorporeal shock wave lithotripsy. This is confirmed by 30 years of observation in the only treatment of kidney calculi by Alken launched in 1981 and continued by Jones et al. Before the era of endoscopic procedures (PCNL and URSL) effectively removed the only deposits in the kidney in open operations. Minimally invasive treatments are recommended for patients with localized deposits in the pelvicalyceal system or solitary kidney ureter. They are recognized as safe and effective treatment in a solitary kidney in particular in patients who have already been operated on. PMID:23255993

Tkocz, Micha?; Ziaja, Damian

2011-01-01

454

Variables influencing radiation exposure during extracorporeal shock wave lithotripsy. Review of 298 treatments  

SciTech Connect

Retrospective review of 298 extracorporeal shock wave lithotripsy (ESWL) treatments was undertaken to determine the factors which influence radiation exposure during ESWL. Fluoroscopy time averaged 160 seconds (3-509), and the average number of spot films taken per patient was 26 (5-68). The average stone burden was 19.3 mm (3-64). Average calculated skin surface radiation exposure was 17.8 R per treatment. Radiation exposure increased with increasing stone burden and patient weight. Stones treated in the ureter resulted in a higher average patient radiation exposure than for renal stones (19 R vs 16 R), even though the average size of these ureteral stones (11.3 mm) was significantly less than the mean. However, type of anesthetic (general or regional) used was not a significant factor. Operator training, experience, and familiarity with radiation physics should significantly decrease the amount of imaging time and consequent patient radiation exposure during ESWL.

Carter, H.B.; Naeslund, E.B.R.; Riehle, R.A. Jr.

1987-12-01

455

Laparoscopic Nephroureterectomy: The Distal Ureteral Dilemma  

PubMed Central

Transitional cell carcinoma affecting the upper urinary tract, though uncommon, constitutes a serious urologic disease. Radical nephroureterectomy remains the treatment of choice but has undergone numerous modifications over the years. Although the standard technique has not been defined, the laparoscopic approach has gained in popularity in the last two decades. The most appropriate oncological management of the distal ureteral and bladder cuff has been a subject of much debate. The aim of the nephroureterectomy procedure is to remove the entire ipsilateral upper tract in continuity while avoiding extravesical transfer of tumor-containing urine during bladder surgery. A myriad of technical modifications have been described. In this article, we review the literature and present an overview of the options for dealing with the lower ureter during radical nephroureterectomy. PMID:19020654

Srirangam, Shalom J.; van Cleynenbreugel, Ben; van Poppel, Hein

2009-01-01

456

Laparoscopic nephroureterectomy: the distal ureteral dilemma.  

PubMed

Transitional cell carcinoma affecting the upper urinary tract, though uncommon, constitutes a serious urologic disease. Radical nephroureterectomy remains the treatment of choice but has undergone numerous modifications over the years. Although the standard technique has not been defined, the laparoscopic approach has gained in popularity in the last two decades. The most appropriate oncological management of the distal ureteral and bladder cuff has been a subject of much debate. The aim of the nephroureterectomy procedure is to remove the entire ipsilateral upper tract in continuity while avoiding extravesical transfer of tumor-containing urine during bladder surgery. A myriad of technical modifications have been described. In this article, we review the literature and present an overview of the options for dealing with the lower ureter during radical nephroureterectomy. PMID:19020654

Srirangam, Shalom J; van Cleynenbreugel, Ben; van Poppel, Hein

2009-01-01

457

Computed tomography manifestations of common inferior vena cava dysplasia and its clinical significance  

PubMed Central

This study aimed to review and analyse the computed tomography (CT) imaging results of frequently encountered developmental anomalies of the inferior vena cava (IVC). The underlying clinical significance was evaluated with reference to the relevant literature. CT images of patients who received abdominal or thoracic scanning between July 2009 and September 2011 were reviewed. Developmental anomalies observed in the IVC were identified and categorised. Images of the cases with typical anomalies were presented and their developmental mechanism, as well as clinical significance, was discussed. The most frequently encountered IVC developmental anomalies include the left vena cava, double vena cava, azygos continuation of the IVC, left circumaortic renal vein, left retroaortic renal vein and retrocaval ureter. The embryogenesis of the IVC is a complex process that results in various congenital anomalies. The developmental anomalies of the IVC are distinguished using a CT scan and have significant implications on clinical perspective. PMID:23407792

QIAN, ZHEN-YU; YANG, MING-FENG; ZUO, KE-QIANG; CHENG, JIE; XIAO, HONG-BING; DING, WEI-XING

2013-01-01

458

Emphysematous pyelonephritis with complete duplication of the left urinary tract  

PubMed Central

Emphysematous pyelonephritis (EPN) is a life-threatening bacterial infection and should be treated rapidly and carefully. We report a case of EPN with complete duplication of the left urinary tract. A 68-year-old woman was admitted to our hospital complaining of high-grade fever and left flank pain. An abdominal computed tomography scan showed gas was presented in the renal parenchyma, not only the pelvis and ureter. Based on these findings, a diagnosis of left EPN was made. A partial nephrectomy of the affected left upper pole moiety was performed and the patient underwent additional medical management. Other 83 cases of EPN from the Japanese literature were reviewed. PMID:22154170

Yamasaki, Yasuto; Koga, Shigehiko; Minami, Yuzo; Sakai, Hideki

2011-01-01

459

[Uretero-external iliac artery fistula with longterm indwelling of ureteral stent].  

PubMed

We report a case of a patient with a fistula between the right ureter and external iliac artery. The patient was a 75-year-old woman who had undergone abdominal radical hysterectomy for uterine cancer, and whole pelvis radiotherapy for right external iliac lymph node metastasis. Her post-operative course was complicated by hydronephrosis of the right kidney, which was treated by the insertion of a double-J stent. While removing the frequently obstructed double-J stent after percutaneous nephrostomy, arterial hemorrhage occurred from the external urethral meatus. Computed tomographic scan demonstrated right ureteral external iliac artery fistula formation located adjacent to the pseudoaneurysm. The patient was treated successfully with endovascular stent grafting and has showed no episode of hematuria since then. PMID:25001641

Hashimoto, Mamoru; Shimizu, Nobutaka; Toyoda, Shingo; Saito, Yoshitaka; Yamamoto, Yutaka; Minami, Takafumi; Hayashi, Taiji; Tsuji, Hidenori; Nozawa, Masahiro; Yoshimura, Kazuhiro; Ishii, Tokumi; Uemura, Hirotsugu

2014-06-01

460

[A case of percutaneous BCG perfusion therapy for CIS of upper urinary tract CIS after radical cystectomy with ileal neobladder].  

PubMed

We report a case of percutaneous bacillus Calmette-Guérin (BCG) perfusion therapy for carcinoma in situ (CIS) of upper urinary tract after radical cystectomy with ileal neobladder. A 42-year-old man underwent radical cystectomy and ileal neobladder diversion due to the recurrence of CIS in prostatic urethra after transurethral resection of bladder tumor 3 times and 2 courses of intravesical BCG therapy. Final pathological findings showed the presence of CIS in the right distal ureteral margin. After the radical cystectomy, our diagnosis was CIS in the right residual ureter, because of positive urine cytology and negative radiographic findings in the upper urinary tract. We performed the percutaneous BCG perfusion therapy for CIS of the right upper urinary tract after the construction of the percutaneous nephrostomy by intentionally inducing hydronephrosis. No recurrence was found after 3 years of BCG perfusion therapy. PMID:25293799

Obayashi, Koki; Miki, Jun; Kasai, Kanako; Tashiro, Kojiro; Tsuduki, Shunsuke; Bando, Shigehiro; Ishii, Gen; Suzuki, Kan; Kimura, Takahiro; Kishimoto, Koichiro; Egawa, Sin

2014-09-01

461

LESSONS FROM PRACTICE A disastrous sequela of a missed ureteric stent  

E-print Network

In 2008, a 42-year-old man with spina bifida, and an ileal conduit since childhood, presented to our emergency department (ED) with right-sided flank pain. He had experienced episodes of stone formation throughout his adult life, most recently in 2003 when an obstructing right renal pelvic stone was treated at another hospital with a percutaneous nephrostomy and antegrade stent. He failed to attend follow-up appointments, and the stent remained in situ. In the 3 years before he presented to our hospital, he was treated at different EDs for acute pyelonephritis, and on all occasions neither the presence nor significance of the retained stent was recognised. X-rays of the kidneys, ureters and bladder obtained on the patient’s admission to our ED confirmed the presence of the retained stent, as well as showing large encrustations associated with proximal and distal coils (Figure, A). Computed tomography

462

Extra-anatomic stent (EAS) as a salvage procedure for transplant ureteric stricture.  

PubMed

Ureteric stricture is the most common urological complication following renal transplantation. Management often involves endo-urological interventions and open surgery. The definitive treatment is surgical reconstruction to restore continuity. Where this is not possible or contra-indicated and a stent cannot be placed in the ureter, an extra-anatomic stent (EAS) could be used to bypass a complete ureteric obstruction. Using an existing nephrostomy tract, a percutaneous stent is placed in the kidney and is tunneled under the skin into the bladder establishing extra-anatomical urinary drainage. We report the use of a novel EAS system in a patient with transplant ureteric stricture when antegrade stent placement or surgical reconstruction was not possible. PMID:24984684

Tahir, W; Hakeem, A; White, A; Irving, H C; Lloyd, S N; Ahmad, N

2014-08-01

463

[Urologic traumatology in childhood (closed injuries)].  

PubMed

Critical injuries of the kidney have to be treated surgically immediately. Here also have to consider the same rules of the surgery that go with an acute abdomen. By slight and severe injuries to the kidneys there is adaequate time for a thorrow diagnostic work up, prior to eventual operative intervention. The extreme rare ureter lesions with the symptomatic of a peritonism due to an urinoma and a retroperitoneal haematoma have to be treated operatively at the earliest possible time. Injuries to the urine bladder have always to be treated operatively with a special urgency since letality increases rapidly after six hours after the injury. Lesions of the urethra have to be treated operatively early by eliminating haematoma and urine and exact anastomosis of urethra's stumps to avoid later complications through scar-building. PMID:6730073

Jonas, D; Hanke, P; Weber, W

1984-04-01

464

Efficacy of expulsive therapy using nifedipine or tamsulosin, both associated with ketoprofene, after shock wave lithotripsy of ureteral stones.  

PubMed

Extracorporeal shock wave lithotripsy (ESWL) is currently considered one of the main treatments for ureteral stones. Some studies have reported the effectiveness of pharmacologic therapies (calcium antagonists or alpha-blockers) in facilitating ureteral stone expulsion after ESWL. We prospectively evaluated the efficacy, after ESWL, of nifedipine on upper-middle ureteral stones, and tamsulosin on lower ureteral stones, both associated to ketoprofene as anti-edema agent. From January 2003 to March 2005 we prospectively evaluated 113 patients affected by radiopaque or radiolucent ureteral stones. Average stone size was 10.16 +/- 2.00 mm (range 6-14 mm). Thirty-seven stones were located in the upper ureter, 27 in the middle ureter, and 49 in the lower ureter. All patients received a single session of ESWL (mean number of shock waves: 3,500) by means of a Dornier Lithotripter S (mean energy power for each treatment: 84%). Both ultrasound and X-ray were used for stone scanning. After treatment, 63 of 113 patients were submitted to medical therapy to aid stone expulsion: nifedipine 30 mg/day for 14 days administered to 35 patients with upper-middle ureteral stones (group A1) and tamsulosin 0.4 mg/day for 14 days administered to 28 patients with stones located in the distal ureter (group A2). The remaining 50 patients were used as a control group (29 upper-middle ureteral stones-B1-and 21 lower ureteral stones-B2-), receiving only pain-relieving therapy. No significant difference in stone size between the groups defined was observed. Stone clearance was assessed 1 and 2 months after ESWL by means of KUB, ultrasound scan and/or excretory urography. A stone-free condition was defined as complete stone clearance or the presence of residual fragments smaller than 3 mm in diameter. The stone-free rates in the expulsive medical therapy group were 85.7 and 82.1% for the nifedipine (A1) and tamsulosin (A2) groups respectively; stone-free rates in the control groups were 51.7 and 57.1% (B1 and B2, respectively). Five patients (14.3%) in group A1, 5 (17.8%) in group A2, 14 (48.3%) in group B1 and 9 (42.8%) in group B2 were not stone-free after a single ESWL session and required ESWL re-treatment or an endoscopic treatment. Medical therapy following ESWL to facilitate ureteral stone expulsion results in increased 1- and 2-month stone-free rates and in a lower percentage of those needing re-treatment. The efficacy of nifedipine for the upper-mid ureteral tract associated with ketoprofene makes expulsive medical therapy suitable for improving overall outcomes of ESWL treatment for ureteral stones. PMID:17396251

Micali, S; Grande, M; Sighinolfi, M C; De Stefani, S; Bianchi, G

2007-06-01

465

Tissue-engineered urinary conduits.  

PubMed

The role of tissue engineering in the cystectomy population rests on the principle of sparing healthy intestinal tissue while replacing diseased bladder. Over the last 25 years advances in cell biology and material science have improved the quality and durability of bladder replacement in animals. The neo-urinary conduit ([NUC]-Tengion) employs autologous fat smooth muscle cells which are seeded onto synthetic, biodegradable scaffolds. This seeded construct is then implanted in the patient and purportedly regenerates native urinary tissue to serve as a passive channel connecting the ureters to the skin surface. Preclinical animal studies as well as the first phase I human trial implanting the NUC are reviewed. While the ultimate goal of creating a durable, effective, tissue-engineered conduit is still in its infancy, important technical and experimental strides have been made. PMID:25677229

Kates, Max; Singh, Anirudha; Matsui, Hotaka; Steinberg, Gary D; Smith, Norm D; Schoenberg, Mark P; Bivalacqua, Trinity J

2015-03-01

466

Anatomy of pelvic floor dysfunction.  

PubMed

Normal physiologic function of the pelvic organs depends on the anatomic integrity and proper interaction among the pelvic structures, the pelvic floor support components, and the nervous system. Pelvic floor dysfunction includes urinary and anal incontinence; pelvic organ prolapse; and sexual, voiding, and defecatory dysfunction. Understanding the anatomy and proper interaction among the support components is essential to diagnose and treat pelvic floor dysfunction. The primary aim of this article is to provide an updated review of pelvic support anatomy with clinical correlations. In addition, surgical spaces of interest to the gynecologic surgeon and the course of the pelvic ureter are described. Several concepts reviewed in this article are derived and modified from a previous review of pelvic support anatomy. PMID:19932407

Corton, Marlene M

2009-09-01

467

Iliac Vein Compression Syndrome due to Bladder Distention Caused by Urethral Calculi  

PubMed Central

We report a rare case of iliac vein compression syndrome caused by urethral calculus. A 71-year-old man had a history of urethral stenosis. He complained of bilateral leg edema and dysuria for 1 week. Physical examination revealed bilateral distention of the superficial epigastric veins, so obstruction of both common iliac veins or the inferior vena cava was suspected. Plain abdominal computed tomography showed a calculus in the pendulous urethra, distention of the bladder (as well as the right renal pelvis and ureter), and compression of the bilateral common iliac veins by the distended bladder. Iliac vein compression syndrome was diagnosed. Bilateral iliac vein compression due to bladder distention (secondary to neurogenic bladder, benign prostatic hyperplasia, or urethral calculus as in this case) is an infrequent cause of acute bilateral leg edema. Detecting distention of the superficial epigastric veins provides a clue for diagnosis of this syndrome. PMID:25802794

Ikegami, Akiko; Kondo, Takeshi; Tsukamoto, Tomoko; Ohira, Yoshiyuki; Ikusaka, Masatomi

2015-01-01

468

About a Case Report of Giant Hydronephrosis  

PubMed Central

Introduction. Our objective is to report a case of an infrequent entity as the giant hydronephrosis. Case Report. We report the case of an 82-syear-old male referred for a poor general condition. A radiological study revealed a great left hydronephrosis secondary to an urothelial carcinoma. The patient died due to his poor general condition. A histological diagnosis revealed a transitional cell carcinoma of renal pelvis and ureter and atrophic renal parenchyma. Conclusion. Giant hydronephrosis represents a very often entity to be taken into account in cases with big cystic abdominal masses in absence of unilateral or bilateral kidney. Simple nephrectomy is the treatment of choice in most cases. Nevertheless, in cases of nonsubsidiary surgery, percutaneous drainage may be necessary. PMID:24191226

Mediavilla, Enrique; Ballestero, Roberto; Correas, Miguel Angel; Gutierrez, Jose Luis

2013-01-01

469

Possible role of hyaluronate in experimental renal stone formation in rabbits.  

PubMed

We produced renal stones in rabbits by modifying Itatani's method, ligation of the right ureter followed by ureteroneocystostomy 1 week later. Renal stones formed in all animals within 2 weeks after ureteroneocystostomy. We measured the components of glycosaminoglycan in the stone matrix, renal tissue and urine by 2-dimensional electrophoresis. Glycosaminoglycan of the stone matrix consisted solely of hyaluronate. Glycosaminoglycan of the control normal urine consisted of only chondroitin sulfate, although hyaluronate was contained in urine in the hydronephrotic and stone forming period. Glycosaminoglycan of the control normal kidney consisted mainly of hyaluronate and chondroitin sulfate, while hyaluronate was the main component of glycosaminoglycan in the stone forming kidney. From these results, it is clear that hyaluronate is the most important component of glycosaminoglycan in the early stone forming period. PMID:3968759

Wakatsuki, A; Nishio, S; Iwata, H; Ochi, K; Takeuchi, M; Matsumoto, A

1985-02-01

470

Management of calcium ureterolithiasis in a French lop rabbit.  

PubMed

A 19-month-old entire male French lop rabbit was presented with a two-week history of a depressed appetite and lethargy. Clinical and laboratory findings, together with abdominal radiographic studies, suggested a diagnosis of right-sided calcium ureterolithiasis. Management included the surgical removal and analysis of the urolith. Confirmation of a calcium-containing urolith and the presence of hypercalcaemia necessitated the introduction of a low calcium diet. Recovery was complicated by the occurrence of a second urolith within the left ureter. This was also removed successfully by surgical means. The rabbit made a full recovery and assessment of serial serum calcium concentration has since confirmed the long-term maintenance of calcium levels within their normal range. PMID:11791774

White, R N

2001-12-01

471

Don't get caught out! A rare case of a calcified urachal remnant mimicking a bladder calculus.  

PubMed

Computer tomography through the kidneys, ureters and bladder (CT KUB) is the mainstay investigation of suspected renal tract calculi. However, several pathologies other than renal tract calculi can cause apparent urinary bladder calcification. We describe the case of a 45 year old man who presented with left sided renal colic. Prone CT KUB performed on admission revealed a calcified urachal remnant mimicking a urinary bladder calculus in the dependent portion of the urinary bladder, confirmed by reviewing the multi-planar reformatted images. This is the first reported case in the literature of this phenomenon. We discuss the importance of using multi-planar reformatted images (MPR) and maximum intensity projection images (MIP), as well as careful review of previous imaging, in making the correct diagnosis. We also discuss the differential diagnoses that should be considered when presented with urinary bladder calcification. PMID:23705044

Rodrigues, Jonathan Carl Luis; Gandhi, Sanjay

2013-03-01

472

An epizootic among knots (Calidris canutus) in Florida. I. Disease syndrome, histology and transmission studies.  

PubMed

About 150 knots found sick or dead had distention of serosal blood vessels, and small, raised hemorrhagic foci on the serosal surface of the jejunum and ileum. The principal finding was endaortitis with large intimal multinucleated cysts that contained a protozoan parasite within a cytoplasmic vacuole. There was endarteritis of mesenteric arteries and muscular arteries of the external layers of the intestinal tract. Single or multiple schizont-like stages containing zoites were in the wall of the small intestine and close to affected muscular arteries. The more usual intestinal lesion was an aneurysm of the inflamed muscular artery. It was concluded that endarteritis led to colonic infarction. Schizonts in medullary renal tubular cells were smaller than stages in the intestine. There was necrosis of epithelial cells of themedullary collecting ducts and inflammatory and regenerative changes. Schizonts and zoites were free in collecting ducts and ureters. PMID:883096

Woodard, J C; Forrester, D J; White, F H; Gaskin, J M; Thompson, N P

1977-07-01

473

Intravenous urography in the dog and the pathogenesis of experimental hydronephrosis  

E-print Network

I' 'X~!XMV. "N3Qy l'Q'%&PIC XR g@. "'MG' 'g&R %18 '. ' ! PATt~w, . K~'L9, QF. ?'F+iZ~XR, 'HVAR HXMVK'Fi~~i'. IBI3 VIXX Dg gARL 9~ 2$$@ 1 1 I ' X?lKLW~UAi33- Ug'Qg;&P, ply @: j'+ Q~ PATH'M:;R, ::8I~ 'O', VXP. "')ZAN. "Nba, HXPRQfP. '. Pi'i3..., thxee and a ha1 f yeex'c passed xxitjxout symntoms cr simnsz The ppesodse oi i n' ection mould appear to determine t!xe onset of acute eympto~~ follomi~, " sursical li?-ation of the ureter, s L!orant . 'e third statex-ent seer& to apply quite mell...

Banks, William Carl

1952-01-01

474

Retroperitoneal Malignant Peripheral Nerve Sheath Tumor Replacing an Absent Kidney in a Child  

PubMed Central

Malignant peripheral nerve sheath tumors (MPNSTs) are nonrhabdomyosarcoma soft tissue sarcomas with rare occurrence in children specially in the retroperitoneum. We describe a young child who presented with an abdominal mass. Both ultrasound and computed tomography revealed a large right-sided abdominal mass in the anatomic place of right kidney, while no kidney or ureter was observed at that side. He underwent surgical resection of the tumor with a primary impression of Wilms tumor. To the authors' knowledge, this is the first case of retroperitoneal malignant peripheral nerve sheath tumor and absent kidney. This case suggests the very rare probability of association of MPNSTs in children with genitourinary tract anomalies such as renal agenesis. PMID:24392233

Alavi, Samin; Arzanian, M. T.; Nilipour, Yalda

2013-01-01

475

The first use of Resonance® metallic ureteric stent in a case of obstructed transplant kidney  

PubMed Central

INTRODUCTION To date, double JJ stent is the mainstay ureteric stent used in a transplant kidney. We herein report the first use of Resonance® metallic ureteric stent to manage ureteric obstruction in a transplant kidney. PRESENTATION OF CASE A 45-year-old lady underwent an uneventful living related donor renal transplantation. Due to post-operative pelvi-ureteric obstruction and recurrent obstruction following multiple distal stent migration and expulsion necessitated frequent nephrostomy insertion and antegrade stenting, she underwent challenging but successful retrograde insertion of a 12 centimetres long and size 6.0 French Cook Resonance® metallic ureteric stent which was performed under general anaesthesia. DISCUSSION Metallic ureteric stents are a fairly recent introduction to modern urology and they have been successfully used in the management of benign and malignant obstruction of ureter. CONCLUSION This is the first case of therapeutic metallic ureteric stent insertion in a transplant kidney. PMID:24858983

Abdulmajed, Mohamed I.; Jones, Vaughan W.; Shergill, Iqbal S.

2014-01-01

476

[Statistics on the operations at the Department of Urology, Toyota Memorial Hospital during an 11-year period (1987-1997)].  

PubMed

A clinical statistic survey was carried out on the operations performed at our Hospital from 1987 through 1997. The total number of operations was 3,383 and the number of operations excluding extracorporeal shock wave lithotripsy (ESWL) was 1,672, consisting of 227 (13.6%) operations of the kidney and ureter, 194 (11.6%) operations of the bladder, 481 (28.8%) operations of the prostate and urethra, and 705 (42.2%) operations of the penis and scrotal contents. Since new endourological technology and ESWL were developed for clinical application, the mode of operation has dramatically changed during the last 11 years, trending toward minimally invasive surgery. PMID:10363155

Tamaki, M; Maeda, S; Yamada, T; Nakano, M; Yamamoto, N; Kawada, Y; Deguchi, T

1999-04-01

477

Onset of hydronephrosis and lower urinary tract symptoms in a previously healthy young man: Phyllodes tumour of the prostate as a potential diagnosis.  

PubMed

We report the case of a 50-year-old healthy man with early onset of micturition symptoms associated with an elevated total prostate-specific antigen. On physical examination, we found an enlarged prostate; a first-line ultrasound of the urinary tract revealed local disease which covered the entire small pelvis. A computed tomography scan confirmed the presence of a 12.5 × 11.0 × 9.5-cm multicystic prostatic mass, compressing the bladder and pelvic ureters, associated with right hydronephrosis. Renal function was preserved and prostatic biopsies was negative for malignant disease. The mass was completely removed through transvesical approach and histological analysis diagnosed a low-grade phyllodes tumour of the prostate. The patient was free of local recurrence and metastasis 36 months after surgery. PMID:25210565

Ferrari, Matteo; Capitanio, Umberto; Rizzo, Nathalie; Freschi, Massimo; Montorsi, Francesco; Rigatti, Patrizio

2014-07-01

478

Laser lithotripsy for ureteric calculi: results in 250 patients.  

PubMed Central

Two hundred and fifty patients with 290 stones presenting to the Department of Urology were treated with the Candela MDL 2000 Laser Lithotripter. Overall stone clearance rate was 95%. The more proximal the calculus the lower the success rate. Ninety eight percent of stones in the lower ureter, 95% of mid ureteric and 91% of upper ureteric stones were cleared. The major complication was perforation which occurred in 6% of cases. This procedure is a safe and effective treatment for ureteric calculi and is associated with a low complication rate and a high clearance rate. Laser lithotripsy is the optimum ureteroscopic method of treating ureteric calculi and is complimentary to extra corporeal shock wave lithotripsy. PMID:8533176

Kelly, J. D.; Keane, P. F.; Johnston, S. R.; Kernohan, R. M.

1995-01-01

479

[Recurrent excessive dilatation of the efferent urinary tract in pregnancy. Case report].  

PubMed

Case report on a patient with an extensive dilatation of renal pelvis and ureter during the first and the following two pregnancies. Operative drainage was performed of renal pelvis on both sides in the 24th and 28th week of the first pregnancy. The second pregnancy ended with spontaneous abortion in the 27th week of pregnancy. Percutaneous punction nephrostomy with successful course of the third pregnancy. Drainage of renal pelvis by punction nephrostomy is indicated in case of co-existence between dilatation of renal pelvis and severe illness and destruction renal parenchyma and of septic pyelonephritis in pregnancy. This procedure should also be done in case of a solitary kidney and excessive dilatation of the renal pelvis. An operative approach is recommended in renal abscess. PMID:3223124

Kindt, J; Retzke, U; Herrmann, K

1988-01-01

480

Educational article: The Mitrofanoff procedure.  

PubMed

The management of urinary incontinence has been revolutionized by the introduction of intermittent catheterization by Lapides in 1972, and later, by the description of the 'trans-appendicular continent cystostomy' by Mitrofanoff in 1980. Mitrofanoff launched a new concept whereby the bladder could be emptied by a route other than the urethra. This concept led to the publication of a plethora of alternatives to the appendix conduit, including the transverse ileal (Yang-Monti) tube, and conduits constructed from ureter, Fallopian tube, tubularized preputial transverse island flap, and longitudinally tubularized ileal and gastric segments. Further experience with the procedure, and the onset of complications such as stomal stenosis and leakage, instigated the description of various stomal options and conduit implantation techniques. More recently, laparoscopic and robotically assisted techniques have also been performed. We present a review of these techniques, and the outcomes reported over the last 30 years since the Mitrofanoff principle was first described. PMID:20188633

Farrugia, Marie-Klaire; Malone, Padraig S

2010-08-01