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Ureteropelvic junction stenosis

Sabrina Thalita Reis, Kátia R M Leite, Nayara Izabel Viana, Roberto Iglesias Lopes, Caio Martins Moura, Renato F Ivanovic, Marcos Machado, Francisco Tibor Denes, Amilcar Giron, William Carlos Nahas, Miguel Srougi, Carlo C Passerotti
BACKGROUND: Ureteropelvic junction obstruction (UPJO) diagnosed prenatally occurs in 1:150 - 1:1200 pregnancies. Although many studies investigating the molecular changes of this obstructed segment have been performed, the underlying mechanisms are still unclear. The role of extracellular matrix (ECM) components remains controversial, and the investigations in the field of ECM changes, might help the better understanding of the pathogenesis of this common condition. The aim of the present study was to investigate for the first time in the literature whether MMP9 and its specific inhibitors, TIMP1 and RECK, are expressed in a reproducible, specific pattern in UPJ...
2016: BMC Urology
Christopher E Bayne, Craig A Peters
INTRODUCTION: Congenital infundibulopelvic stenosis (IFPS) is a rare renal dysmorphism marked by dilated calyces proximal to diminutive infundibulum and renal pelvises. The entity is theorized to exist on the spectrum of congenital obstructive renal diseases between ureteropelvic junction obstruction and multicystic dysplasia. OBJECTIVE: This case series sought to review and present the surgical management of three cases of IFPS with progressive renal insufficiency...
June 21, 2016: Journal of Pediatric Urology
Alberto Parente, Jose-Maria Angulo, Rosa Romero, Laura Burgos, Ruben Ortiz
AIM: To assess if calibration of the ureteropelvic junction (UPJ) using a high-pressure balloon inflated at the UPJ level in patients with suspected crossing vessels (CV) could differentiate between intrinsic and extrinsic stenosis prior to laparoscopic vascular hitch (VH). MATERIALS AND METHODS: We reviewed patients with UPJO diagnosed at childhood or adolescence without previous evidence of antenatal or infant hydronephrosis (10 patients). By cystoscopy, a high-pressure balloon is sited at the UPJ and the balloon inflated to 8-12 atm under radiological screening...
January 2016: International Braz J Urol: Official Journal of the Brazilian Society of Urology
Tuna Mut, Ömer Acar, Tayfun Oktar, Işın Kılıçaslan, Tarık Esen, Haluk Ander, Orhan Ziylan
INTRODUCTION: Based on current knowledge, it is possible to have an initial diagnosis of intrinsic or extrinsic ureteropelvic junction obstruction (UPJO) based solely on clinical and imaging findings. However, it may not be possible to strictly discriminate an intrinsic case with an additional extrinsic component from a primarily intrinsic stenosis because of lower pole aberrant vessels. These two disorders may coexist or trigger each other. Herein, we aimed to compare the histological changes observed in intrinsic and extrinsic types of UPJO...
August 2016: Journal of Pediatric Urology
Tomaž Smrkolj, Domagoj Šalinović
We report a rare case of a patient with a large stone encrusted on a nitinol mesh stent in the ureteropelvic junction. The stent was inserted in the year 2000 after failure of two pyeloplasty procedures performed due to symptomatic ureteropelvic junction stenosis. By combining minimally invasive urinary stone therapies-extracorporeal shock wave lithotripsy, semirigid ureterorenoscopy with laser lithotripsy, and percutaneous nephrolithotomy-it was possible to completely remove the encrusted stone and nitinol mesh stent that was implanted for 15 years, rendering the patient symptom and obstruction free...
2015: Case Reports in Urology
Dong Seok Han, Seung Mo Yuk, Chang Shik Youn, Geon Park, Hae Joung Sul, Hoon Jang
BACKGROUND: Primary mucinous adenocarcinoma of the renal pelvis is extremely rare, with only ~100 cases reported till now. Its presumed pathogenesis includes glandular metaplasia of the urothelium of the calyces and the pelvis and malignant transformation of the metaplasia. Unfortunately, it has no characteristic symptoms or radiological features. We report a case of primary mucinous adenocarcinoma of the renal pelvis misdiagnosed as ureteropelvic junction stenosis with a renal pelvis stone...
2015: World Journal of Surgical Oncology
Bo Yang, Hao Hu, Jia Wang, Tao Xu, Xiao-bo Huang, Xiao-feng Wang
OBJECTIVE: To report a new endourological technique-percutaneous "sandwich" endopyeloplasty for ureteropelvic junction obstruction (UPJO). METHODS: In the study, 71 patients with UPJO had endopyeloplasty by percutaneous balloon dilation before and after endopyelotomy, so called "sandwich" endopyeloplasty. The ureter stent was removed after 2 months and all the patients were followed up at least 12 months by ultrasound, intravenous urogram (IVU) or renal scintigraphy...
August 18, 2015: Beijing da Xue Xue Bao. Yi Xue Ban, Journal of Peking University. Health Sciences
Aliasghar Yarmohamadi, Parisa Saeedi, Amir Hoghabrosadat
BACKGROUND: Anderson-Hynes dismembered pyeloplasty is the gold standard therapeutic approach to ureteropelvic junction obstruction (UPJO). Use of a drainage method to protect the suture line from leakage is a matter of controversy. OBJECTIVES: We have compared the surgical outcome of Anderson-Hynes dismembered pyeloplasty for UPJO repair, with or without internal stenting. PATIENTS AND METHODS: Eighty-two patients with UPJO were evaluated from 1996 to 2002...
May 2015: Nephro-urology Monthly
M Traumann, L A Kluth, M Schmid, C Meyer, B Schwaiger, C Rosenbaum, P Schriefer, M Fisch, R Dahlem, D Seiler, S Ahyai, A Haese, F K-H Chun
PURPOSE: With the development of the robot-assisted surgical technique, robot-assisted pyeloplasty (RAP) has become established as an alternative to open and laparoscopic surgery. Currently there are only a few single-center studies with larger numbers of cases and long-term results. The aim of this study was to investigate perioperative and long-term postoperative success rates of Anderson-Hynes robot-assisted pyeloplasty (RAP) at a single center. MATERIALS AND METHODS: We retrospectively reviewed our RAP experience of 61 patients performed by two surgeons between 2004 and 2013 regarding operating time, length of hospital stay, perioperative complication, and success...
May 2015: Der Urologe. Ausg. A
Juan Gómez Rivas, Sergio Alonso Y Gregorio, María A Portilla Eastmond, Angel Tabernero Gómez, Jesús Cisneros Ledo, Luis Hidalgo Togores, Jesús Javier de la Peña Barthel
INTRODUCTION: Laparoscopic pyeloplasty was first described by Schuessler. During the last decade, this technique has been developed in order to achieve the same results as open surgery, with lower rates of morbidity and complications. In this study we review our experience using laparoscopic pyeloplasty as the gold standard for the treatment of the ureteropelvic junction obstruction (UPJO). MATERIAL AND METHODS: We performed a retrospective review of 62 laparoscopic pyeloplasties carried out at our center...
2013: Central European Journal of Urology
A Nicholas Kurup
Although percutaneous ablation of small renal masses is generally safe, interventional radiologists should be aware of the various complications that may arise from the procedure. Renal hemorrhage is the most common significant complication. Additional less common but serious complications include injury to or stenosis of the ureter or ureteropelvic junction, infection/abscess, sensory or motor nerve injury, pneumothorax, needle tract seeding, and skin burn. Most complications may be treated conservatively or with minimal therapy...
March 2014: Seminars in Interventional Radiology
Xisheng Wang, Zejian Zhang, Naixiong Peng, Chunxiao Liu
OBJECTIVE: To compare classical open pyeloplasty with retroperitoneal laparoscopic pyeloplasty in effectiveness, potential advantages and complications. MATERIALS AND METHODS: Between March 2006 and April 2010, 113 patients with ureteropelvic junction obstruction underwent retroperitoneal laparoscopic dismembered pyeloplasty were retrospectively compared with those of 59 patients who underwent open dismemberse pyeloplasty through a retroperitoneal flank approach...
2013: Journal of X-ray Science and Technology
Alberto Parente, José-María Angulo, Rosa Maria Romero, Susana Rivas, Laura Burgos, Ana Tardáguila
OBJECTIVE: To analyze the usefulness of dilatation in the treatment of ureteropelvic junction obstruction (UPJ) in children <18 months of age, including newborns and infants. METHODS: Patients (n = 50; <18 months of age) were diagnosed using abdominal ultrasound, cystogram, and diuretic renography. Treatment was with endourologic retrograde balloon dilatation under fluoroscopic guidance. The balloons were, in all cases, semicompliant with a profile of 5 mm, 6 mm, or 7 mm...
November 2013: Urology
Lessandro Curcio, Antonio Claudio Ahouagi, Juan Renteria, Igor Rui Araujo, Daniel Presto
OBJECTIVE: About 10% of renal pelvis are bifids and not so there is a larger index of kidney disease over the normal pelves. The laparoscopy and minimally invasive techniques treat the ureteropelvic junction disease in a low agressive manner. We showed a video of an atypical pyeloplasty of ureteropelvic junction obstruction of a lower unit. The patient is a 33 year-old woman with an intermitent lumbar pain for 3 years. Your image exams showed a bifid left pelvis with a stenosis of the lower unit...
May 2013: International Braz J Urol: Official Journal of the Brazilian Society of Urology
Morihiro Nishi, Masatsugu Iwamura, Shinji Kurosaka, Tetsuo Fujita, Kazumasa Matsumoto, Kazunari Yoshida
INTRODUCTION: The objective of this study is to clarify whether symphysiotomy is an essential procedure combined with the laparoscopic pyeloplasty for the surgical treatment of ureteropelvic junction obstruction related to horseshoe kidney. METHODS: We retrospectively reviewed five horseshoe kidney patients with symptomatic hydronephrosis who underwent laparoscopic transperitoneal Anderson-Hynes pyeloplasty without symphysiotomy between July 2002 and October 2011...
August 2013: Asian Journal of Endoscopic Surgery
Asaph Rolnitsky, Paul Merlob, Gil Klinger
Oxcarbazepine is an antiepileptic agent that has been used during pregnancy, although its safety during pregnancy has not been sufficiently established. This article presents an infant born with renal and cardiac malformations who developed a withdrawal syndrome and hyponatremia following in utero exposure to oxcarbazepine. The infant was born at 35 weeks' gestation by urgent cesarean section to a mother in status epilepticus who had been treated with oxcarbazepine throughout her pregnancy. Evaluation for congenital anomalies identified mild aortic stenosis, a bicuspid aortic valve, patent foramen ovale, patent ductus arteriosus, and severe left hydronephrosis due to left ureteropelvic junction stenosis...
June 2013: Pediatric Neurology
Hülya Yalçın, Aynur Ozen, Emel Ceylan Günay, Inci Aliç Ozaslan, Cahit Ozer
OBJECTIVE: In the literature, there are many reports comparing relative renal function calculated with Tc 99m DTPA and Tc 99m DMSA in adults and children. However, there is no consensus about the results. As there is indeterminacy in the reliability of Tc 99m DTPA for the calculation of the relative renal functions, we retrospectively designed a study to compare the relative renal functions measured with Tc 99m DMSA and Tc 99m DTPA in adult patients with renal diseases Material and Methods: We retrospectively analyzed the data of 144 patients who applied to Nuclear Medicine Department of three hospitals between 2009 and 2010 and who had both dynamic and static renal imaging...
April 2011: Molecular Imaging and Radionuclide Therapy
Alberto Parente, José María Angulo, Susana Rivas, Rosa María Romero, Carolina Corona, Ana Tardaguila
OBJECTIVE: In recent years new techniques in minimally invasive treatment of congenital stenosis of ureteropelvic junction have been developed. We report the treatment of pyeloureteral stenosis in children by percutaneous endopyelotomy. METHODS: In the work up study of a child (18 months) with abdominal palpable mass, a severe left hydronephrosis with a renal pelvis diameter of 65 mm and severely thinned renal parenchyma was found. The diuretic renogram showed an obstructive pattern with impaired renal function...
November 2012: Archivos Españoles de Urología
Koosha Kamali, Mohammad Amin Abbasi, Ata Abbasi, Ahmad Mortazavi, Mohammad Hasan Seifee
PURPOSE: Although obesity has been associated with improved survival on dialysis, its effects on renal transplantation outcomes remain unclear. Herein we aimed to evaluate the effect of obesity on posttransplantation complications. PATIENTS AND METHODS: A retrospective analysis of consecutive renal transplant recpients from un related living donors was undertaken from 2006 to 2008. RESULTS: We included 180 patients, 34 (18%) were obese (body mass index >30 kg/m(2)) and 146 were lean...
June 2010: Indian Journal of Surgery
Laura Velarde Ramos, Francisco Sepulveda, Eloy Silva, Octavio A Castillo
OBJECTIVE: Present the case of a patient with a discontinuous intrabdominal splenogonadal fusion with an associated germ cell tumor. METHODS: A case of a man of 29 years with bilateral cryptorchidism and left intra-abdominal discontinuous splenogonadal fusion associated with seminoma as an accidental finding in the context of a robotic pyeloplasty due to ipsilateral ureteropelvic junction stenosis. RESULTS: The total operative time was 80 minutes (atrophic gonad removal and pyeloplasty by the Anderson-Hynes technique) with an estimated blood loss less than 100 cc...
October 2012: Archivos Españoles de Urología
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