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Ureteral duplex

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https://www.readbyqxmd.com/read/27923152/hydronephrosis-in-the-wnt5a-ablated-kidney-is-caused-by-an-abnormal-ureter-bladder-connection
#1
Kangsun Yun, Alan O Perantoni
The Wnt5a null mouse is a complex developmental model which, among its several posterior-localized axis defects, exhibits multiple kidney phenotypes, including duplex kidney and loss of the medullary zone. We previously reported that ablation of Wnt5a in nascent mesoderm causes duplex kidney formation as a result of aberrant development of the nephric duct and abnormal extension of intermediate mesoderm. However, these mice also display a loss of the medullary region late in gestation. We have now genetically isolated duplex kidney formation from the medullary defect by specifically targeting the progenitors for both the ureteric bud and metanephric mesenchyme...
December 3, 2016: Differentiation; Research in Biological Diversity
https://www.readbyqxmd.com/read/27919138/-modified-toyoda-method-for-complete-duplex-ureters-in-tubeless-cutaneous-ureterostomy-report-of-a-case
#2
Chul Jang Kim, Ryo Fujiwara, Hiroto Yamashita
A 65-year-old man underwent radical cystectomy and cutaneous ureterostomy for bladder cancer. Because the patient had left complete duplex ureters,we modified the Toyoda method to construct the tubeless cutaneous ureterostomy with a unilateral stomal creation. The adhesive portion of both ureteral walls in duplex ureters was simultaneously cut approximately 5 mm from the distal end longitudinally,and the common sheath of the cut portion of the ureters was cut approximately 5 mm longitudinally in order to separate the two ureters...
November 2016: Hinyokika Kiyo. Acta Urologica Japonica
https://www.readbyqxmd.com/read/27867847/retroperitoneal-and-laparoscopic-heminephrectomy-in-duplex-kidney-in-infants-and-children
#3
Ciro Esposito, Maria Escolino, Marco Castagnetti, Antonio Savanelli, Angela La Manna, Alessandra Farina, Francesco Turrà, Agnese Roberti, Alessandro Settimi, Francois Varlet, Holger Till, Jean Stephan Valla
BACKGROUND: Two main techniques are adopted to perform partial nephrectomy in children: laparoscopy and retroperitoneoscopy. The aim of this paper is to review the larger multicentric experience recently published by our group to review indications, techniques and results of both approaches. METHODS: Data of 102 patients underwent partial nephrectomy in a 5-year period using minimally invasive surgery (MIS) procedures were analyzed. Fifty-two children underwent laparoscopic partial nephrectomy (LPN), and 50 children underwent retroperitoneoscopic partial nephrectomy (RPN)...
October 2016: Translational pediatrics
https://www.readbyqxmd.com/read/27843217/robot-assisted-pyeloplasty-for-pelvi-ureteric-junction-obstruction-of-lower-moiety-in-partial-duplex-system-a-technical-challenge
#4
Girdhar S Bora, Kalpesh Parmar, Ravimohan S Mavuduru
Management of pelvi-ureteric junction obstruction (PUJO) in a duplex system is technically challenging as dissection at the pelvis may jeopardize the vascularity of the normal moiety ureter. Anastomosing the pelvis to the one single ureter will have a risk of future development of stricture which then will risk both the moieties. Robotic assistance enables appropriate tissue dissection; minimal handling of normal ureter and precision in suturing, overcoming the potential challenges involved in the minimally invasive management of such complex cases...
October 2016: Indian Journal of Urology: IJU: Journal of the Urological Society of India
https://www.readbyqxmd.com/read/27790549/ureteral-reflux-into-an-ectopic-upper-moeity-of-a-duplex-kidney-from-the-bladder-neck-with-distal-ureteral-pseudodiverticulum-formation
#5
Denver Steven Pinto, Tom George, Deepali Saxena, Thara Joseph, V Ravi Hoisala
Urinary incontinence is a condition causing significant psychological trauma and affects the quality of life of the affected individual. Though common causes of urinary incontinence of non-traumatic aetiology in young adults include detrusor instability and congenital conditions like meningomyelocoele, an ectopic ureter is an important surgically correctable cause of urinary incontinence. The cause of incontinence in an ectopic ureter is insertion of the ureter distal to the internal urethral sphincter. The authors describe a case report of an ectopic ureter arising from a duplex moiety with poor renal function using multiple modalities...
September 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/27697471/utility-of-retrograde-ureterocelogram-in-management-of-complex-ureterocele
#6
M K Arevalo, J C Prieto, N Cost, G Nuss, B J Brown, L A Baker
INTRODUCTION: Symptomatic pediatric ureterocele has diverse manifestations, making evidence-based management impractical. Thus, detailed visualization of ureterocele anatomy prior to first surgical incision is invaluable. Retrograde ureterocelogram (RUC) is a simple, underutilized radiologic technique that can be performed during cystoscopy. This study sought to determine whether RUC changes surgical management by more accurately depicting the complex ureteral and ureterocele anatomy, compared with renal ultrasound (US) and voiding cystourethrography (VCUG)...
September 17, 2016: Journal of Pediatric Urology
https://www.readbyqxmd.com/read/27695208/comparison-of-intravenous-urography-and-magnetic-resonance-urography-in-preoperative-evaluation-of-pelvi-ureteric-junction-obstruction-in-children
#7
Alok Sharma, Kushaljit Singh Sodhi, Akshay Kumar Saxena, Anmol Bhatia, Prema Menon, Katragadda L N Rao, Niranjan Khandelwal
AIMS: To compare intravenous urography (IVU) and magnetic resonance urography (MRU) in the preoperative evaluation of pelvi-ureteric junction obstruction (PUJO) in children. MATERIALS AND METHODS: A total of 35 children up to 10 years of age in whom unilateral or bilateral PUJO were suspected on ultrasonography were enrolled in this prospective study. All children underwent IVU and MRU, and the findings were compared. RESULTS: Of the 70 kidneys evaluated, 14 (20%) were not visualized on IVU because of nonexcretion of contrast, whereas all the 70 (100%) kidneys were visualized on MRU...
October 2016: Journal of Indian Association of Pediatric Surgeons
https://www.readbyqxmd.com/read/27545957/the-morphology-and-treatment-of-coexisting-ureteropelvic-junction-obstruction-in-lower-moiety-of-duplex-kidney
#8
Wei Liu, Liujuan Zhang, Rui Ma, Rongde Wu
BACKGROUND: Duplex kidney is a common congenital anomaly of the urinary tract, while ureteropelvic junction obstruction (UPJO) in lower unit of duplex kidney is rare. Surgical treatment can be challenging in such cases. The aim was to report our experience in managements of UPJO in lower moiety of duplex kidney. METHODS: Among the pediatric patients with duplex system from 2007-2013, 7 children were diagnosed with UPJO in lower moiety. Their medical records were retrospectively analyzed, mainly focused on anatomic aspects and operation details...
August 18, 2016: International Journal of Surgery
https://www.readbyqxmd.com/read/27542552/innovation-in-robotics-and-pediatric-urology-robotic-ureteroureterostomy-for-duplex-systems-with-ureteral-ectopia
#9
Michael J Biles, Julia B Finkelstein, Mark V Silva, Sarah M Lambert, Pasquale Casale
INTRODUCTION: Robotic technology has been increasingly utilized for complicated reconstructive surgeries in pediatric urology, such as ureteroureterostomy (UU). The literature is limited regarding the performance of minimally invasive UU in children, and the existing published series utilize indwelling ureteral stents. We sought to report on our pediatric experience with robot-assisted laparoscopic (RAL)-UU using a temporary ureteral catheter in duplex systems with ureteral ectopia. METHODS: A retrospective chart review was performed of all pediatric patients who underwent RAL-UU at a single institution over a 2-year period...
October 2016: Journal of Endourology
https://www.readbyqxmd.com/read/27121408/laparoscopic-psoas-hitch-double-ureteral-re-implantation-in-the-duplex-urinary-system-for-treatment-of-ureterovaginal-fistula
#10
Tito Palmela Leitão, Ricardo Pereira E Silva, Sónia Barata, Adalgisa Guerra, Filipa Osório
INTRODUCTION: Although laparoscopy is widely established for ablative urologic procedures, pelvic reconstructive procedures are still mostly performed by open-surgery. As urologists continue to introduce advanced laparoscopic skills to reconstructive urologic procedures, we present our experience with a laparoscopic psoas hitch double ureteral re-implantation in a patient with an ureterovaginal fistula and an ipsilateral duplex urinary system. MATERIALS AND METHODS: A 42-year-old patient presented with continuous involuntary urine loss from the vagina after an abdominal hysterectomy...
April 2016: Surgical Technology International
https://www.readbyqxmd.com/read/27117052/endoscopic-treatment-of-grades-iv-and-v-vesicoureteral-reflux-with-two-bulking-substances-dextranomer-hyaluronic-acid-copolymer-versus-polyacrylate-polyalcohol-copolymer-in-children
#11
Canan Kocaoglu
PURPOSE: We aimed at evaluating the efficacy and complications of two bulking substances: dextranomer/hyaluronic acid copolymer(Dx/Ha;Dexell®) versus polyacrylate polyalcohol copolymer(PPC;Vantris®) in subureteric injection treatment of children with high grades (grades IV-V) vesicoureteral reflux(VUR). METHODS: Data of patients undergoing endoscopic treatment of high grade VUR (January 2009-August 2015) were retrospectively investigated. Patients with high grade VUR caused by posterior urethral valve, duplex system, paraureteral diverticula and neurogenic bladder were excluded...
October 2016: Journal of Pediatric Surgery
https://www.readbyqxmd.com/read/26985816/bilateral-obstruction-of-bilaterally-duplicated-collecting-systems-requiring-upper-and-lower-moiety-drainage
#12
J O Lynch, A Cox, B Rawal, S Shelmerdine, N Vasdev, A Patel
A 60-year-old woman with a history of breast cancer presented with bilateral obstruction of bilaterally duplicated renal collecting systems secondary to extrinsic compression from metastatic pelvic lymphadenopathy. Bilateral JJ ureteric stents were inserted, resulting in some improvement of renal function but a failure to normalise completely. Repeat computed tomography demonstrated bilateral duplex collecting systems with persisting obstruction of the undrained moieties. Selective puncture was performed to decompress the obstructed renal moieties for bilateral nephrostomy catheter insertion...
April 2016: Annals of the Royal College of Surgeons of England
https://www.readbyqxmd.com/read/26981222/multi-modality-imaging-review-of-congenital-abnormalities-of-kidney-and-upper-urinary-tract
#13
REVIEW
Subramaniyan Ramanathan, Devendra Kumar, Maneesh Khanna, Mahmoud Al Heidous, Adnan Sheikh, Vivek Virmani, Yegu Palaniappan
Congenital abnormalities of the kidney and urinary tract (CAKUT) include a wide range of abnormalities ranging from asymptomatic ectopic kidneys to life threatening renal agenesis (bilateral). Many of them are detected in the antenatal or immediate postnatal with a significant proportion identified in the adult population with varying degree of severity. CAKUT can be classified on embryological basis in to abnormalities in the renal parenchymal development, aberrant embryonic migration and abnormalities of the collecting system...
February 28, 2016: World Journal of Radiology
https://www.readbyqxmd.com/read/26942033/duplicated-renal-system-with-h-shaped-ureter-an-extraordinary-anomaly
#14
Fatih Akbulut, Metin Savun, Burak Ucpinar, Murat Sahan, Burak Arslan, Faruk Ozgor, Abdulmuttalip Simsek, Ahmet Yalcın Berberoglu, Murat Baykal, Murat Binbay
Duplex collecting systems are the most commonly encountered anomaly of the urinary system. Complete duplex system with an H shaped ureter is a very rare situation. There are only two reported H ureter cases in the literature. Herein, we aimed to present an H shaped ureter case, which was identified while performing ureterorenoscopy to a 48-year-old female patient due to a right distal ureteral stone.
2016: Case Reports in Urology
https://www.readbyqxmd.com/read/26794322/wnt5a-deficiency-leads-to-anomalies-in-ureteric-tree-development-tubular-epithelial-cell-organization-and-basement-membrane-integrity-pointing-to-a-role-in-kidney-collecting-duct-patterning
#15
Ilkka Pietilä, Renata Prunskaite-Hyyryläinen, Susanna Kaisto, Elisavet Tika, Albertien M van Eerde, Antti M Salo, Leonardo Garma, Ilkka Miinalainen, Wout F Feitz, Ernie M H F Bongers, André Juffer, Nine V A M Knoers, Kirsten Y Renkema, Johanna Myllyharju, Seppo J Vainio
The Wnts can be considered as candidates for the Congenital Anomaly of Kidney and Urinary Tract, CAKUT diseases since they take part in the control of kidney organogenesis. Of them Wnt5a is expressed in ureteric bud (UB) and its deficiency leads to duplex collecting system (13/90) uni- or bilateral kidney agenesis (10/90), hypoplasia with altered pattern of ureteric tree organization (42/90) and lobularization defects with partly fused ureter trunks (25/90) unlike in controls. The UB had also notably less tips due to Wnt5a deficiency being at E15...
2016: PloS One
https://www.readbyqxmd.com/read/26587938/incidence-and-spectrum-of-renal-complications-and-extrarenal-diseases-and-syndromes-in-380-children-and-young-adults-with-horseshoe-kidney
#16
Bo-Kyung Je, Hee Kyung Kim, Paul S Horn
OBJECTIVE: The objective of our study was to evaluate the incidence and spectrum of renal complications and of extrarenal diseases and syndromes in children with horseshoe kidney (HSK). MATERIALS AND METHODS: The clinical data and imaging studies of 380 subjects (median age, 2.8 years) diagnosed with HSK over a 24-year period were reviewed: 366 children and young adults and 14 fetuses, one of whom died in utero. All renal complications and extrarenal diseases and syndromes were documented...
December 2015: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/26577623/a-comparison-between-laparoscopic-and-retroperitoneoscopic-approach-for-partial-nephrectomy-in-children-with-duplex-kidney-a-multicentric-survey
#17
Ciro Esposito, Maria Escolino, Go Miyano, Paolo Caione, Fabio Chiarenza, Giovanna Riccipetitoni, Atsuyuki Yamataka, Antonio Savanelli, Alessandro Settimi, Francois Varlet, Dariusz Patkowski, Mariapina Cerulo, Marco Castagnetti, Holger Till, Rosaria Marotta, Angela La Manna, Jean-Stephane Valla
PURPOSE: To compare the outcome of laparoscopic and retroperitoneoscopic approach for partial nephrectomy in infants and children with duplex kidneys. METHODS: Data of 102 patients underwent partial nephrectomy in a 5-year period using MIS procedures were analyzed. Fifty-two children underwent laparoscopic partial nephrectomy (LPN), and 50 children underwent retroperitoneoscopic partial nephrectomy (RPN). Median age at surgery was 4.2 years. Statistical analysis was performed using χ (2) test and Student's t test...
July 2016: World Journal of Urology
https://www.readbyqxmd.com/read/26443241/robot-assisted-laparoscopic-management-of-duplex-renal-anomaly-comparison-of-surgical-outcomes-to-traditional-pure-laparoscopic-and-open-surgery
#18
Daniel Herz, Jennifer Smith, Daryl McLeod, Megan Schober, Janae Preece, Paul Merguerian
INTRODUCTION: Surgical management of duplex renal anomaly (DRA) is complex because of individual anatomic variation, competing priorities of vesicoureteral reflux (VUR) and ureteral obstruction present in the same child, the varied differential function of the different renal moieties, and the presence of voiding dysfunction and recurrent urinary tract infection (UTI). Robot-assisted laparoscopic (RAL) surgical management has been under-reported in this group of children but is becoming a viable alternative to traditional open surgery...
February 2016: Journal of Pediatric Urology
https://www.readbyqxmd.com/read/26261472/sepsis-due-to-pyonephrosis-an-adult-with-pelvic-ureteric-junction-obstruction-pujo-in-a-duplex-kidney
#19
Francesco Simoni, Nicola Vitturi
We present the case of a 75-year-old woman with sepsis. She was evaluated with bedside ultrasound with a diagnosis of pyonephrosis, and subsequently underwent a TC scan that showed a pelvic-ureteric junction obstruction (PUJO) in a duplicated renal system. PUJO associated with duplex kidney, while relatively frequent in children, is a rare condition in adults, and may lead to severe complications as in this case.
September 2015: Journal of Ultrasound
https://www.readbyqxmd.com/read/26210696/diagnostic-value-of-hydrodistention-of-the-ureteral-orifice
#20
S Moralıoğlu, A Cerrah Celayir, O Bosnali
INTRODUCTION/OBJECTIVE: The dynamic hydrodistention (HD) classification is a basic and objective way of rating the ureteral orifice opening. This study evaluated the value of hydrodistention of the ureteral orifice in the diagnosis of vesicoureteral reflux (VUR). MATERIAL AND METHODS: Between January 2012 and March 2013 the HD grade in 106 ureters was prospectively assigned. A 9.5-Fr rigid cystoscope with a 0-degree lens was used in all procedures. Warm saline was used and the irrigation bag was placed approximately 1 m above the bladder level on full flow...
December 2015: Journal of Pediatric Urology
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