213 results match your criteria duplex collecting


Sheathless synchronous flexible ureterorenoscopy with holmium laser lithotripsy in complete duplex renal collecting system with stones.

Urol Case Rep 2021 Jul 7;37:101707. Epub 2021 May 7.

Dept of Urology, PGIMER, Chandigarh, India.

Duplication of renal system is one of the commonest renal anomalies. It is infrequently associated with renal calculus, ureterocele and vesico ureteric reflux. We report a 29-year male with right complete duplex system having upper moiety multiple ureteric calculi and lower moiety inferior renal calculus. Read More

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CTU findings of duplex kidney in kidney: A rare duplicated renal malformation.

Open Med (Wars) 2021 19;16(1):651-654. Epub 2021 Apr 19.

Department of Radiology, Longgang District People's Hospital of Shenzhen & The Third Affiliated Hospital (Provisional) of The Chinese University of Hong Kong, Shenzhen, Guangdong Province, 518172, China.

Duplex kidney is a common congenital malformation appeared as duplication of pelvis and ureter. However, renal duplication within sinus renalis is an extremely rare variation of the renal collecting system. In this study, we report a case of an asymptomatic kidney disease in a 33-year-old man, who demonstrates abnormal echo of renal sinus anomaly discovered incidentally in ultrasound examination. Read More

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Congenital anomalies of the kidney and urinary tract in a cohort of 280 consecutive patients with Hirschsprung disease.

Pediatr Nephrol 2021 Apr 9. Epub 2021 Apr 9.

Pediatric Surgery, Umberto Bosio Center for Digestive Diseases, The Children Hospital, AO SS Antonio e Biagio e Cesare Arrigo, Alessandria, EU, Italy.

Background: Congenital anomalies of the kidney and urinary tract (CAKUT) have been underestimated in Hirschsprung disease (HSCR). This paper aims at reporting results of patients with HSCR who underwent kidney and urinary tract assessment.

Methods: Patients seen between December 2005 and November 2020 underwent a complete kidney and urinary tract diagnostic workup. Read More

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Renal morphology and function from childhood to adulthood in Turner syndrome.

Clin Exp Nephrol 2021 Jun 22;25(6):633-640. Epub 2021 Feb 22.

Department of Pediatrics, Toranomon hospital, 2-2-2 Tranomon, Minato-ku, Tokyo, 1058470, Japan.

Background: Turner syndrome (TS) is a chromosomal disorder with various complications, including congenital anomaly of the kidney and urinary tract (CAKUT). However, its renal function remains poorly known. Therefore, this study aimed to evaluate renal function in TS of various ages from childhood to adulthood. Read More

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The ectopic ureter opening into the vulva, which is a rare cause of lifelong urinary incontinence: Treatment with ureteroureterostomy.

Urol Case Rep 2021 May 5;36:101597. Epub 2021 Feb 5.

Erciyes University, Department of Urology, Erciyes Üniversitesi, Gevher Nesibe Hastanesi, 1. Kat Üroloji Kliniği, Melikgazi, Kayseri, Turkey.

Persistent urinary incontinence (UI) in adults may indicate a congenital anomaly. Before initiating medical treatment in these patients, a detailed physical examination is necessary for establishing an accurate diagnosis. In this study, we report on a patient who presented with the complaint of congenital UI associated with ectopic ureter and was detected with a right complete duplex collecting system and a ureter opening into the vulva and the surgical treatment applied to that patient. Read More

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Congenital Anomalies of the Upper Urinary Tract: A Comprehensive Review.

Radiographics 2021 Mar-Apr;41(2):462-486. Epub 2021 Jan 29.

From the Department of Radiology, Diagnósticos da América SA (DASA), Av Juruá 434, Alphaville Industrial, Barueri, SP 06455-010, Brazil.

The upper urinary tract is the most common human system affected by congenital anomalies. Congenital anomalies of the kidneys and ureters comprise a wide spectrum of disorders ranging from simple variants with no clinical significance to complex anomalies that may lead to severe complications and end-stage renal disease. They may be classified as anomalies of renal form, which are subclassified as structural anomalies (eg, persistent fetal lobulation, hypertrophied column of Bertin, and dromedary hump) and fusion anomalies (eg, horseshoe kidney and pancake kidney); anomalies of renal position (eg, renal malrotation, simple renal ectopia, and crossed renal ectopia) and renal number (eg, renal agenesis and supernumerary kidney); and abnormalities in development of the urinary collecting system (eg, pyelocaliceal diverticulum, megacalycosis, ureteropelvic junction obstruction, duplex collecting system, megaureter, ectopic ureter, and ureterocele). Read More

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January 2021

Indocyanine Green Fluorescence-Guided Laparoscopic Lower-Pole Heminephrectomy for Duplex Kidney in Adult.

J Endourol Case Rep 2020 29;6(4):384-387. Epub 2020 Dec 29.

Department of Urology, Ijinkai Takeda General Hospital, Kyoto, Japan.

Intraoperative indocyanine green (ICG) near-infrared fluorescence guidance is a type of optical imaging technology now available to facilitate a better understanding of surgical landmarks. This case describes use of this technique during lower-pole heminephrectomy for a patient with duplex kidney. A 50-year-old woman with a left duplex system and lower-pole kidney infection underwent a laparoscopic transperitoneal lower-pole heminephrectomy. Read More

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December 2020

A Case of Left Duplex Kidney with Hydronephrosis Mimicking a Left Renal Cyst in a 29-Year-Old Woman.

Am J Case Rep 2020 Nov 22;21:e927430. Epub 2020 Nov 22.

Division of Urology, Department of Surgery, Cathay General Hospital, Taipei, Taiwan.

BACKGROUND Duplex kidney, also known as duplex renal collecting system, consists of 2 ureters arising from a single kidney and is a common congenital anomaly. The condition is usually an asymptomatic normal variant. However, abnormal anatomic variants such as hydronephrosis, vesicoureteral reflux (VUR), and ureterocele are sometimes observed in a patient with a duplicated kidney. Read More

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November 2020

How I do it open distal ureteroureterostomy for ectopic ureters in infants with duplex systems and no vesicoureteral reflux under 6 months of age.

Int Braz J Urol 2021 May-Jun;47(3):610-614

Departament of Surgery, McMaster University, Hamilton, Canada.

We describe a step by step technique for open distal ureteroureterostomy (UU) in infants less than 6 months presenting with duplex collecting system and upper pole ectopic ureter in the absence of vesicoureteral reflux (VUR). Read More

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Ipsilateral robot assisted laparoscopic side to side ureteroureterostomy in a duplex collecting system - A video case report with 1 year follow up.

Urol Case Rep 2020 Nov 26;33:101325. Epub 2020 Jun 26.

St. Vincent's University Hospital, Elm Park, Dublin 4, University College Dublin (UCD), Ireland.

A 26-year-old male presented with an obstructing calculus in the mid superior-moiety ureter in a duplicated urinary collecting-system. A sequela of the obstruction resulted in a symptomatic stricture in a functional superior-moiety ureter, unresponsive to endoscopic interventions. An ipsilateral robot-assisted laparoscopic side-to-side ureteroureterostomy was performed thus bypassing the stricture in the superior-moiety ureter. Read More

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November 2020

Evaluation of the efficiency of TaqMan duplex real-time PCR assay for non-invasive pre-natal assessment of foetal sex in equine.

Reprod Domest Anim 2021 Feb 14;56(2):287-291. Epub 2020 Dec 14.

Research Institute of Animal Embryo Technology, Shahrekord University, Shahrekord, Iran.

Accurate diagnosis of foetal sex in pregnant mare is helpful for many breeders, both for private or commercial purposes. In this study, in order to pre-natal foetal sexing in equine, we used TaqMan duplex real-time PCR to detect the specific regions of SRY and TSPY genes on extracted cell-free foetal DNA from maternal blood. Peripheral blood samples from 50 pregnant Arabian mares with singleton foetuses were collected. Read More

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February 2021

Neural crest derivatives and neuroendocrine cells in the gut of anencephalic and fetuses without congenital defects.

Birth Defects Res 2020 11 11;112(19):1720-1732. Epub 2020 Sep 11.

Facultad de Medicina y Ciencias Biomédicas, Universidad Autónoma de Chihuahua, Chihuahua, Chihuahua, Mexico.

Background: The enteric nervous system (ENS), a component of the peripheral nervous system in the intestinal walls, regulates motility, secretion, absorption, and blood flow. Neural crest (NC) migration, fundamental for ENS development, may be altered by central nervous system development alterations, such as neural tube defects (NTD). Intestinal innervation anomalies have been correlated to NTD. Read More

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November 2020

A case of solitary kidney with duplex collecting systems and renal vascular variants in an adult male cadaver.

Folia Morphol (Warsz) 2020 Aug 4. Epub 2020 Aug 4.

University of Massachusetts Medical School, 55 Lake Avenue North, 01655 Worcester, United States.

We describe a unique solitary kidney with duplex collecting system and vascular variation observed in an 86-year-old White male formaldehyde- and phenol-fixed cadaver during routine academic dissection. The left renal fossa was empty with an intact adrenal gland, and the right renal fossa contained a fused renal mass with apparent polarity between the superior and inferior regions and two renal pelves converging into a single ureter. There were three right renal arteries supplying the renal mass; the superior and middle arteries were noted to be postcaval and the inferior artery was precaval. Read More

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A rare case of herniated duplex collecting system causing obstructive uropathy.

BMC Urol 2020 Jul 1;20(1):83. Epub 2020 Jul 1.

Department of Medicine, St. Elizabeth's Medical Center, Boston, MA, USA.

Background: An inguinal hernia is the protrusion of intraabdominal organs through an opening in the abdominal wall. Structures such as small and large intestines are commonly contained within inguinal hernias. However, uretero-inguinal hernia of the native collecting system is an extremely rarely reported entity. Read More

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Dorsal lumbotomy for pediatric upper pole hemi-nephrectomy: Back (door) to the future?

J Pediatr Urol 2020 Aug 7;16(4):480.e1-480.e7. Epub 2020 May 7.

Faculty of Medicine, University of British Columbia, Vancouver, BC, Canada; Department of Urologic Sciences, University of British Columbia, BC Children's Hospital, Vancouver, BC, Canada. Electronic address:

Introduction: Upper pole heminephrectomy (UHN) is performed for two main indications in children: ectopic ureterocele and duplication anomalies with upper pole ectopy, both in the context of a poorly functioning upper pole moiety. Current popular techniques for conducting UHN include laparoscopic (LPN) and robot-assisted laparoscopic (RAPN).

Objective: To evaluate outcomes following dorsal lumbotomy (DL), an open approach used historically for pyeloplasty and pyelolithotomy, and in which no clinical trials or exclusive case-series have been conducted for upper pole hemi-nephrectomy (UHN) in children. Read More

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Optimization of a Low-Cost, Sensitive PNA Clamping PCR Method for JAK2 V617F Variant Detection.

J Appl Lab Med 2020 07;5(4):643-655

UOC Onco-Hematology, AORN SS Anna e Sebastiano, Caserta, Italy.

Background: The JAK2 V617F variant is diagnostic for myeloproliferative neoplasms, a group of clonal disorders of hematopoietic stem and progenitor cells. Although several approaches have been developed to detect the variant, a gold standard diagnostic method has not yet been defined. We describe a simple, fast, and cost-effective PCR-based approach that enhances test specificity and sensitivity by blocking the amplification of the large excess of wild-type DNA. Read More

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Tortuous Duplicated Collecting System Complicated by Ureterovesical Junction Compression.

Curr Urol 2020 Mar 20;14(1):50-53. Epub 2020 Mar 20.

McKay Urology, Atrium Health, Charlotte, NC, USA.

Duplex collecting system of the kidney is a common congenital anomaly of the urinary tract and is less reported in the adult population. Rarely, this anomaly can result in ureterovesical junction compression. Herein, we present a case of ureterovesical junction compression occurring in an adult patient with a duplex collecting system and describe the surgical management. Read More

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Metachronous ureteral metastasis of clear cell renal cell carcinoma in a duplex collecting system 1 year after nephrectomy.

Urol Case Rep 2020 Sep 16;32:101214. Epub 2020 Apr 16.

Nepean Urology Research Group, Nepean Hospital, PO Box 63, Penrith, NSW, 2751, Australia.

While renal cell carcinoma is known to metastasise in an unpredictable pattern, even after resection of a primary tumour, delayed ureteric metastasis is a very rarely reported phenomenon. In this case report, we describe a case of ipsilateral metachronous ureteric metastasis in a patient with a complete duplex collecting system. This case demonstrates some useful strategies in the diagnosis and treatment of renal cell carcinoma in this context. Read More

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September 2020

Duplication of ureter in a 7-year-old: a case report.

Radiol Case Rep 2020 May 18;15(5):564-569. Epub 2020 Mar 18.

Atma Jaya Catholic University of Indonesia, Jakarta, Indonesia.

Duplication of ureter is one of the most common anomalies of the urinary tract. Early detection has dramatically increased due to advance in technology of imaging to detect the anomalies during antenatal period; however, numbers of undiagnosed adult still exist. It may remain asymptomatic, but may cause repeated urinary tract infections or calculi. Read More

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Screening for Renal and Urinary Tract Anomalies in Asymptomatic First Degree Relatives of Children with Congenital Anomalies of the Kidney and Urinary Tract (CAKUT).

Indian J Pediatr 2020 09 20;87(9):686-691. Epub 2020 Mar 20.

Department of Pediatric Surgery, Jawaharlal Institute of Postgraduate Medical Education and Research (JIPMER), Pondicherry, India.

Objective: To estimate the frequency of renal and urinary tract anomalies in first-degree relatives of children with Congenital anomalies of kidney and urinary tract (CAKUT).

Methods: This descriptive study was conducted on parents and siblings of 138 children with CAKUT. Renal ultrasonogram, radionuclide diuretic renogram and micturating cysturethrogram were the tools used for screening these family members. Read More

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September 2020

Extracranial midline defects in a patient with craniofrontonasal syndrome with a novel EFNB1 mutation.

Am J Med Genet A 2020 05 5;182(5):1223-1229. Epub 2020 Feb 5.

Center for Registry and Research in Congenital Anomalies (CRIAC), Service of Genetics and Cytogenetic Unit, Pediatric Division, "Dr. Juan I. Menchaca" Civil Hospital of Guadalajara, Guadalajara, Mexico.

We report a female patient with craniofrontonasal syndrome (CFNS) who in addition showed other cranial and extracranial midline defects including partial corpus callosum agenesis, ocular melanocytosis, pigmentary glaucoma, duplex collecting system, uterus didelphys, and septate vagina. She was found to have a novel pathogenic variant in exon 5 of EFNB1, c.646G>T (p. Read More

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Prenatal imaging features and postnatal outcomes of isolated fetal duplex renal collecting system: A systematic review and meta-analysis.

Prenat Diagn 2020 03 28;40(4):424-431. Epub 2020 Jan 28.

Department of Medical and Surgical Sciences, Institute of Obstetrics and Gynecology, University of Foggia, Foggia, Italy.

Objectives: To perform a systematic review of studies reporting the outcome of fetuses with a prenatal diagnosis of isolated duplex collecting system (DCS).

Methods: Inclusion criteria were studies reporting the outcome of fetuses with a prenatal diagnosis of isolated DCS, defined as DCS not associated with other major structural anomalies at the time of diagnosis. The outcomes observed were: imaging features of DCS on prenatal ultrasound, associated anomalies detected exclusively at prenatal follow-up ultrasound and at birth, abnormal karyotype, symptoms at birth (including vesicoureteral reflux [VUR] and urinary tract infections [UTI]), need for and type of surgical approach, complications after surgery, and accuracy of prenatal ultrasound in correctly identifying this anomaly. Read More

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Genetic manipulation of ureteric bud tip progenitors in the mammalian kidney through an Adamts18 enhancer driven tet-on inducible system.

Dev Biol 2020 02 14;458(2):164-176. Epub 2019 Nov 14.

Department of Stem Cell Biology and Regenerative Medicine, Eli and Edythe Broad-CIRM Center for Regenerative Medicine and Stem Cell Research, W.M. Keck School of Medicine of the University of Southern California, CA, 90089, USA. Electronic address:

The ureteric epithelial progenitor (UEP) population within the embryonic kidney generates the arborized epithelial network of the kidney's collecting system and plays a critical role in the expansion and induction of the surrounding nephron progenitor pool. Adamts18 shows UEP- restricted expression in the kidney and progenitor tip-restricted expression in several other organs undergoing branching epithelial growth. Adamts18 is encoded by 23 exons. Read More

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February 2020

Supernumerary kidneys: a clinical and radiological analysis of nine cases.

BMC Urol 2019 Oct 17;19(1):93. Epub 2019 Oct 17.

Department of Radiology, Medical University of Innsbruck, Anichstraße 35, 6020, Innsbruck, Austria.

Background: A supernumerary kidney (SK) is an additional kidney with its own capsule and blood supply that is not fused with the ipsilateral kidney (IK). Because individual case reports indicate a high morbidity rate, the aim of this retrospective study was a detailed analysis of this rare anatomical variant.

Methods: Our systematic imaging-based search for SKs, conducted in the period from 2000 and to 2017, yielded 9 cases in total (5 men, 4 women; mean age: 51. Read More

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October 2019

Concomitant multiple anomalies of renal vessels and collecting system.

Folia Morphol (Warsz) 2020 16;79(3):627-633. Epub 2019 Oct 16.

Department of Anatomy, Faculty of Medical Sciences, University of Kragujevac, Kragujevac, Serbia.

Although anomalies of renal vessels and collecting system are relatively frequent, their concomitant occurrence is a rare event. During dissection of a 75-year-old male formalin-embalmed cadaver, we found multiple variations in the renal vessels and renal collecting system. Both kidneys were normal in size and anteriorly malrotated, with duplex collecting system and duplex ureter. Read More

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Double trouble: A unique case of TRUS biopsy induced left upper moiety infection of a duplicated ectopic ureter.

Urol Case Rep 2019 Nov 13;27:100999. Epub 2019 Aug 13.

Department of Urology, GHPSO Hospital, Creil, France.

Duplex collecting systems are seen in 0.7% of the population and its association with an ectopic ureter (specifically in the ejaculatory duct) is even less common. We presented a 57 year-old male with an elevated PSA and suspicious findings on a multiparametric MRI (mpMRI) who underwent transrectal ultrasound (TRUS) guided biopsies. Read More

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November 2019

Is an analysis of copy number variants necessary for various types of kidney ultrasound anomalies in fetuses?

Mol Cytogenet 2019 5;12:31. Epub 2019 Jul 5.

1Fetal Medicine Center, Department of Obstetrics and Gynecology, The First Affiliated Hospital of Sun Yat-sen University, 58 Zhong Shan Er Road, Guangzhou, 510080 Guangdong China.

Background: This study aimed to estimate the associations of copy number variants (CNVs) with fetal kidney ultrasound anomalies. A total of 331 fetuses with kidney ultrasound anomalies who underwent prenatal chromosomal microarray analyses were enrolled. The fetuses were classified into groups with isolated and nonisolated anomalies or according to the types of kidney anomalies. Read More

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Radiologic features of Castleman's disease involving the renal sinus: A case report and review of the literature.

World J Clin Cases 2019 Apr;7(8):1001-1005

Department of Radiology, Hebei General Hospital, Shijiazhuang 050051, Hebei Province, China.

Background: We present a rare case of plasma cell type of Castleman's disease (CD) involving only the right renal sinus in a 65-year-old woman with a duplex collecting system (DCS).

Case Summary: The patient presented with a right renal sinus lesion after renal ultrasonography. Subsequent abdominal enhanced computed tomography (CT) and magnetic resonance imaging (MRI) of the kidneys showed DCS and a soft tissue mass with mild enhancement at the lower right renal sinus. Read More

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Laparoscopic transperitoneal heminephrectomy for treatment of the nonfunctioning moiety of duplex kidney in adults: A case series.

Investig Clin Urol 2019 05 19;60(3):210-215. Epub 2019 Apr 19.

Department of Urology, King George's Medical University, Lucknow, Uttar Pradesh, India.

Purpose: We report the results and experience of a tertiary care center in laparoscopic transperitoneal heminephrectomy for the treatment of a non-functioning upper pole moiety of duplex kidney in adults.

Materials And Methods: The key point of the technique included the placement of a 6-Fr ureteric catheter in the healthy ureter at the beginning of the procedure under fluoroscopic guidance cystoscopically. A standard laparoscopic 3- to 4-port placement was done after placing the patient in a 45 to 90 degrees lateral decubitus position. Read More

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