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Ureter obstruction

Atsushi Aikawa, Masaki Muramatsu, Yusuke Takahashi, Yuko Hamasaki, Junya Hashimoto, Mai Kubota, Youji Hyoudou, Yoshihiro Itabashi, Takeshi Kawamura, Seiichiro Shishido
Lower urinary tract abnormalities are difficult to resolve in pediatric kidney transplant patients. Measure of residual urine, voiding cystourethrography, retrograde urethrography, cystometry, electromyography of urethral external sphincter muscle, urethrometry, and uroflowmetry are the primary methods for evaluation of lower urinary tract abnormalities. Endoscopic resection or ablation of urethral valves is required in children with posterior urethral valve to treat obstruction, but bladder function does not always recover and may deteriorate to end-stage renal failure even after the obstruction is released...
March 2018: Experimental and Clinical Transplantation
Shouzhe Lin, Dameng Lian, Weihua Liu, Aaron Haig, Ian Lobb, Ahmed Hijazi, Hassan Razvi, Jeremy Burton, Matthew Whiteman, Alp Sener
OBJECTIVES: To assess the effects of slow-releasing H2 S donor GYY4137 on post-obstructive renal function and injury following unilateral ureteral obstruction (UUO) by using the UUO and reimplantation (UUO-R) model in rats and to elucidate potential mechanisms by using an in vitro model of epithelial-mesenchymal transition (EMT). METHODS: Male Lewis rats underwent UUO at the left ureterovesical junction. From post-obstructive day (POD) 1-13, rats received daily intraperitoneal (IP) injection of phosphate buffered saline (PBS, 1 mL) or GYY4137 (200 μmol/kg/day in 1 mL PBS, IP)...
March 6, 2018: Nitric Oxide: Biology and Chemistry
Philippa R Pavia, Allyson C Berent, Chick W Weisse, Dana Neiman, Kenneth Lamb, Demetrius Bagley
OBJECTIVE To describe the technique and short- and long-term outcomes for dogs undergoing double-pigtail ureteral stent placement for treatment of benign ureteral obstruction. DESIGN Retrospective case series. ANIMALS 44 dogs (57 ureters). PROCEDURES Medical records of dogs that underwent ureteral stenting for treatment of benign ureteral obstruction between 2010 and 2013 were reviewed. Signal-ment, history, pertinent diagnostic imaging results, endourologic and post-procedural details, duration of hospitalization, complications, and outcome (short term, 7 to 30 days; long term, > 30 days) were recorded...
March 15, 2018: Journal of the American Veterinary Medical Association
Megan Cray, Allyson C Berent, Chick W Weisse, Demetrius Bagley
CASE DESCRIPTION 4 cats were examined because of ureteral obstruction. CLINICAL FINDINGS Clinical and clinicopathologic abnormalities were nonspecific and included anorexia, lethargy, weight loss, anemia, leukocytosis, neutrophilia, lymphopenia, and azotemia. A diagnosis of pyonephrosis was made in all cats. The presence of bacteriuria was confirmed by means of urinalysis in 2 cats, bacterial culture of a urine sample obtained by means of preoperative cystocentesis in 2 cats, and bacterial culture of samples obtained from the renal pelvis intraoperatively in 3 cats...
March 15, 2018: Journal of the American Veterinary Medical Association
Lillian R Aronson, Andreanne Cleroux, Chloe Wormser
OBJECTIVE: To describe the use and long term outcome of a novel surgical technique developed to treat a proximal ureteral obstruction in a cat. STUDY DESIGN: Case report. ANIMALS: A 3-year-old female spayed Russian blue cat. METHODS: A 3-year-old female spayed Russian blue cat presented with a fever, decreased appetite, vomiting, and abdominal discomfort. A proximal left ureteral obstruction was noted on ultrasonographic examination...
March 5, 2018: Veterinary Surgery: VS
Cosimo Bleve, Valeria Bucci, Maria Luisa Conighi, Francesco Battaglino, Lorenzo Costa, Lorella Fasoli, Elisa Zolpi, Salvatore Fabio Chiarenza
Horseshoe kidney (HSK) is a congenital defect of the urinary tract that occurs in 0.25% of the general population. Laparoscopic Vascular Hitch (LVH) according to Hellstrom-Chapman represent an alternative approach in treatment of extrinsic hydronephrosis by crossing vessels (CV) in pediatric age. In our Department from 2006 to 2016, 36 children with extrinsic-Uretero-Pelvic-Junction (UPJ)-Obstruction (UPJO) underwent laparoscopic vessels transposition. Over the last 4years, we have treated three patients with extrinsic hydronephrosis in HSK; two males and one female respectively of 6, 7 and 8years...
December 13, 2017: La Pediatria Medica e Chirurgica: Medical and Surgical Pediatrics
Alissa C Deming, Kathleen M Colegrove, Padraig J Duignan, Ailsa J Hall, James F X Wellehan, Frances M D Gulland
Urogenital carcinoma is common in wild California sea lions ( Zalophus californianus) along the west coast of the US. From 1979 to 1994, this cancer was observed in 18% (66/370) of necropsied subadult and adult sea lions at The Marine Mammal Center in Sausalito, California. A retrospective review of records from 1 January 2005 to 31 December 2015 was performed to characterize prevalence and characteristics of cancer over this decade. Fourteen percent (263/1917) of necropsied sea lions had cancer, of which 90% (237/263) were urogenital carcinoma...
March 2, 2018: Journal of Wildlife Diseases
Leah H Hellerstein, Stuart Marshall Sacks, Daniel K Hellerstein
A 59-year-old man with a medical history of hypertension, gout and obesity presented to the hospital with a chief complaint of worsening scrotal oedema. The patient endorsed associated symptoms of decreased force of stream on urination, stranguria and hesitancy with slight dysuria. Physical exam showed an effaced umbilicus and phallus with a hidden scrotum estimated to be 30×20×30 cm in size. Imaging and lab findings led to a diagnosis of total bladder herniation within an incarcerated right inguinal hernia...
February 27, 2018: BMJ Case Reports
Federico Soria, Esther Morcillo, Alvaro Serrano, Alberto Budia, Inmaculada Fernández, Tomás Fernández-Aparicio, Francisco M Sanchez-Margallo
OBJECTIVES: The purpose is to determine the effects in urinary tract of a new antireflux biodegradable ureteral stent. MATERIAL AND METHODS: Thirty six ureters belonging to 24 pigs were used. The study began with an endoscopic, nephrosonographic and fluoroscopic assessment. Three study groups of n=12 ureters were then specified. In Group I, a biodegradable antireflux stent (BDG-ARS) was inserted in the right ureter of 12 pigs. Group II was comprised by the left ureter of the same animals, in which a double pigtail stent was placed for 6 weeks...
February 19, 2018: Urology
Wang Shuaibin, Mu Haiqi, Feng Qin, Yu Haifeng
Suprapubic cystostomy is a widely employed procedure that is used to drain the bladder. Despite being a safe procedure, suprapubic cystostomy has been reported to present multiple intra- and postoperative complications. Serious and unusual complications can occur during changing of the suprapubic catheter (SPC) in patients with neuropathic bladder. In this work, we report an elderly patient with neuropathic bladder suffering from an unusual complication involving migration of the SPC into the ureter during changing of the SPC, leading to ureteric obstruction and left pyelonephritis...
February 18, 2018: Urology Journal
San Kim, Sang Hoo Park, Dong Yoon Kim, Seok Joong Yun, Ok Jun Lee, Heon Seok Han
A congenital bladder diverticulum (CBD) is caused by inherent muscular weakness instead of obstruction of the bladder outlet. The major clinical conditions are recurrent urinary tract infection (UTI) and voiding dysfunction. This report describes a 15-year-old male adolescent who developed sudden visual disturbance resulting from hypertensive retinopathy. The cause of hypertension was bilateral obstructive uropathy caused by enlarged paraureteral bladder diverticula. After the non-functioning right kidney and ureter and the bilateral diverticula were removed, the left ureter was reimplanted in the bladder...
February 19, 2018: Journal of Korean Medical Science
Alexis Jibril, Andrew C Stevens
BACKGROUND Plasmacytoid is a rare histological variant of urothelial carcinoma (UC). Since the first reported case of plasmacytoid urothelial carcinoma (PUC), in 1991, only about 100 cases have since been reported, with most cases involving the bladder. Urothelial carcinomas of the upper urinary tract represent only 5% of urothelial cancers. To the best of our knowledge, there has only been 1 reported case of PUC of the ureter. PUC is a highly aggressive disease, with a poor prognosis. We present a rare biopsy-proven case of PUC of the ureter with retroperitoneal metastasis...
February 13, 2018: American Journal of Case Reports
Mohammad Ali Ghaed, Maziar Daniali, Mohammad Ebrahimian
Malignant ureteral obstruction is usually caused by an extrinsic compression including intra-abdominal cancers. One of the treatment modalities decompressing the obstruction is applying stent to open the ureter. Metallic Stent is an effective instrument which we used for the first time in Iran in our patient who had a metastatic colon cancerwith a single kidney and we used a Novel, Double-Layered, Coated, Self-expandable Metallic Mesh Stent (Uventa Stent) to keep the ureter open. After six months of follow up with ureteroscopy, there was no obstruction any more...
February 10, 2018: Urology Journal
Rômulo F Assumção, Marco A Pereira-Sampaio, Francisco J B Sampaio, Diogo B de Souza
OBJECTIVE: To investigate, in a rodent model, the influence of an obstructed kidney/ureter on the contralateral organ morphology. METHODS: Thirty-six rats were randomly assigned into the following groups: untreated ureteral obstruction group (UO-U, n = 10), submitted to a ligature of the ureter at day 0; UO group (at day 0) followed by nephrectomy after 24 h (UO-N, n = 8); nephrectomy group (N, n = 9), submitted to nephrectomy at day 0; and sham group (S, n = 9), submitted to simulated surgery at day 0...
February 8, 2018: Urologia Internationalis
Mi Liu, Yangyang Zhu, Ying Sun, Zhaoying Wen, Songming Huang, Guixia Ding, Aihua Zhang, Zhanjun Jia, Yue Zhang
Ureteral obstruction is associated with reduced expressions of renal sodium transporters, which contributes to impaired urinary concentrating capacity. In this study, we employed a synthetic mitochondrial superoxide dismutase 2 (SOD2) mimic MnTBAP to investigate the role of mitochondrial oxidative stress in modulating the sodium transporters in obstructive kidney disease. Following unilateral ureteral obstruction (UUO) for 7 days, a global reduction of sodium transporters including NHE3, NCC, NKCC2, and ENaCα was observed as determined by qRT-PCR, Western Blotting or immunohistochemistry...
January 2, 2018: Oncotarget
Minki Baek, Mesrur Selcuk Silay, Jason K Au, Gene O Huang, Rodolfo A Elizondo, Kathleen Puttmann, Nicolette K Janzen, Abhishek Seth, David R Roth, Chester J Koh
BACKGROUND: Re-do pyeloplasty after failed open or laparoscopic ureteropelvic junction (UPJ) obstruction correction can be a challenging procedure because of scar formation at the previous anastomosis site and decreased vascularity of the ureter. This study compared the perioperative parameters for pediatric robot-assisted laparoscopic (RAL) primary and re-do pyeloplasties with an emphasis on the intra-operative parameters. MATERIALS AND METHODS: We compared the perioperative parameters of pediatric RAL procedures performed by a single surgeon at a tertiary care children's hospital for both primary ureteropelvic junction obstruction (UPJO) and recurrent UPJO after a previous open or laparoscopic procedure over 2013-2015...
February 6, 2018: Journal of Laparoendoscopic & Advanced Surgical Techniques. Part A
Adarsh S Manjunath, Matthias D Hofer
Urologic emergencies can involve the kidneys, ureters, bladder, urethra, penis, scrotum, or testicles. History and physical examination are essential to diagnosis, whereas imaging is increasingly used to confirm diagnoses. Acute urinary retention should be relieved with Foley placement. Penile emergencies include paraphimosis, which can be treated by foreskin reduction, whereas penile fracture and priapism require urologic intervention. Fournier gangrene and testicular torsion are scrotal emergencies requiring emergent surgery...
March 2018: Medical Clinics of North America
Alice Thoreau, Phuong Lien Tran, Marc Gabriele, Hélène Flye Sainte Marie, Malik Boukerrou
In vitro fertilization (IVF) is nowadays a reliable and common method for couple who need medically assisted procreation. Complications are rare. We report in this paper, the case of a woman with severe endometriosis who developed ureteral obstruction complicated by a renal rupture of the fornix due to ovarian hyperstimulation during an IVF attempt. The condition was diagnosed by CT scan and resolved with insertion of double-J catheter in the left ureter.
January 29, 2018: Journal of Gynecology Obstetrics and Human Reproduction
Weiling Xu, Fangchao Gong, Dong Dong, Baorong Chi, Jingyu Wang
RATIONALE: Although rare, cases of renal failure secondary to a uretero-inguinal hernia have been reported. PATIENT CONCERNS: Here, we report a case of left renal failure caused by chronic obstructive uropathy due to a uretero-inguinal hernia combined with contralateral renal pelvic carcinoma. DIAGNOSES: The present case highly indicated that a comprehensive examination is very important when diagnosing an inguinal hernia. In particular, it is necessary to check whether the ureter is involved or not...
December 2017: Medicine (Baltimore)
Huaming Zhang, Guimin Zhuang, Dongchong Sun, Tianxing Deng, Jiawei Zhang
RATIONALE: Spontaneous renal rupture is rupture of the renal parenchyma, collecting system, or renal blood vessel, which often occurs in pathological kidney and is clinically less common. Postoperative long-term renal rupture is rarely reported in flexible ureteroscopy treatment of calculus in the upper urinary tract. PATIENT CONCERNS: A 58-year-old man complained of right lower abdominal pain with hematuria for 3 hours after flexible ureteroscopy, combined with holmium laser lithotripsy of right renal calculi was performed 1 month ago...
December 2017: Medicine (Baltimore)
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