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J Indian Assoc Pediatr Surg 2022 May-Jun;27(3):333-339. Epub 2022 May 12.

Department of Radiodiagnosis, Postgraduate Institute of Medical Education and Research, Chandigarh, India.

Aims: This study aims to determine the etiology of antenatal hydronephrosis (ANH) and predict need for surgical intervention based on antenatal renal pelvis anteroposterior diameter (APD).

Materials And Methods: Combined prospective and retrospective study (2012-2018) of ANH cases with postnatal follow-up. Surgical intervention was correlated with the degree of hydronephrosis (HDN) and pelvis APD measured at the 2 trimester, 3 trimester, and postnatal 6-week follow-up. Read More

Exp Ther Med 2022 Jul 17;24(1):450. Epub 2022 May 17.

Department of Urology, Affiliated Hospital of Hebei University of Engineering, Handan, Hebei 056004, P.R. China.

Ureteropelvic junction obstruction (UPJO) is a common congenital malformation of the urinary system, which is mostly unilateral and frequently combined with hydronephrosis and kidney stones. The incidence of kidney stones is ~20%, which markedly increases the difficulty and risk of surgery. The present report describes a rare case of bilateral UPJO combined with bilateral renal stones. Read More

Investig Clin Urol 2022 May 25. Epub 2022 May 25.

Department of Convergence Medicine, Asan Medical Center, Seoul, Korea.

Purpose: We investigated the feasibility of measuring the hydronephrosis area to renal parenchyma (HARP) ratio from ultrasound images using a deep-learning network.

Materials And Methods: The coronal renal ultrasound images of 195 pediatric and adolescent patients who underwent pyeloplasty to repair ureteropelvic junction obstruction were retrospectively reviewed. After excluding cases without a representative longitudinal renal image, we used a dataset of 168 images for deep-learning segmentation. Read More

J Pediatr Urol 2022 May 13. Epub 2022 May 13.

Department of Pediatric Urology, Rady Children's Hospital San Diego, San Diego, CA, USA; Department of Urology, University of California San Diego, San Diego, CA, USA.

Background: Although multi-center research is needed in pediatric urology, collaboration is impeded by differences in physician documentation and research resources. Electronic health record (EHR) tools offer a promising avenue to overcome these barriers.

Objective: To assess the accuracy, completeness, and utilization of structured data elements across multiple practices. Read More

Ann Med Surg (Lond) 2022 May 23;77:103643. Epub 2022 Apr 23.

Department of Urology, Aleppo University Hospital, Aleppo, Syria.

Introduction: Isolated blunt abdominal trauma in children is a rare condition. Pre-existing malformations like ureteropelvic junction (UPJ) obstruction makes the condition a urological dilemma.

Presentation Of Case: A seven-year-old boy presented with blunt abdominal trauma. Read More

Turk J Urol 2022 May;48(3):229-235

Department of Urology and Renal Transplantation, Sanjay Gandhi Postgraduate Institute of Medical Sciences, Lucknow, India.

Objective: To determine the pertinence of percutaneous nephrostomy drainage in adult patients of primary ureteropelvic junction obstruction with poorly functioning kidneys (<20% split renal function).

Material And Methods: Clinical records of all patients with primary ureteropelvic junction obstruction with poorly functioning kidneys who underwent percutaneous nephrostomy drainage in our institute between February 2015 and January 2020 were retrospectively reviewed. The patients were divided into 4 groups according to their split renal function obtained from the Tc-99m ethylenedicysteine diuretic renogram. Read More

Yonago Acta Med 2022 May 15;65(2):126-131. Epub 2022 Apr 15.

Division of Urology, Department of Surgery, School of Medicine, Faculty of Medicine, Tottori University, Yonago 683-8503, Japan.

Background: The aim of this study is to compare the results of laparoscopic pyeloplasty and robot-assisted laparoscopic pyeloplasty in patients with ureteropelvic junction obstruction.

Methods: Between March 2008 and May 2019, the patients who underwent retroperitoneal laparoscopic or robotic-assisted laparoscopic pyeloplasty in our institution were retrospectively reviewed.

Results: Thirteen patients underwent laparoscopically, and 12 patients underwent robotic surgery. Read More

J Med Case Rep 2022 May 23;16(1):220. Epub 2022 May 23.

Department of Medicine, Einstein Medical Center Philadelphia, Philadelphia, PA, USA.

Background: Bilateral ureteropelvic junction obstruction is a common cause of secondary hypertension in the pediatric population, often due to congenital malformation. On the other hand, it is less frequently encountered in the adult population and is usually due to an acquired condition, most commonly by a bilaterally obstructing nephrolithiasis causing hydronephrosis and subsequent hypertension. The aim of this study was to investigate and highlight the underlying mechanisms by which acute bilateral ureteropelvic junction obstruction causes hypertensive crisis and why early detection and prompt treatment are necessary to mitigate the effects of elevated blood pressure on target organs. Read More

Cent Eur J Immunol 2022 10;47(1):63-72. Epub 2022 May 10.

Department of Pediatrics and Nephrology, Medical University of Warsaw, Warsaw, Poland.

Congenital obstructive nephropathy (CON) is one of the most common causes of chronic kidney disease in children. The aim of the study was to investigate serum and urine periostin and cytokeratin-18 (CK-18) in children with CON in relation to CON etiology, treatment, and kidney injury. We evaluated 81 children with CON secondary to ureteropelvic junction obstruction (UPJO), ureterovesical junction obstruction (UVJO), posterior urethral valves (PUV) and 60 controls. Read More

Front Pediatr 2022 25;10:863625. Epub 2022 Apr 25.

Pediatric Urology, Hospital General Universitario Gregorio Marañón, Madrid, Spain.

Purpose: To analyze the effectiveness, complications and long-term outcome of the patients with ureteropelvic junction obstruction (UPJO) treated by endoscopic retrograde balloon dilatation (ERBD) in the largest series reported.

Materials And Methods: Between years 2004 and 2018, 112 patients with primary unilateral UPJO were treated by ERBD. Endoscopic treatment consisted on a retrograde balloon dilatation of the ureteropelvic junction (UPJ), through cystoscopy and under fluoroscopic guidance, using high-pressure balloon catheters. Read More

J Nephrol 2022 May 11. Epub 2022 May 11.

Pediatric Urology, Adana City Research and Education Hospital, Adana, Turkey.

Urol Case Rep 2022 May 16;42:102036. Epub 2022 Feb 16.

Department of Urology, Tokushima University Graduate School of Biomedical Sciences, 3-18-15 Kuramoto, Tokushima, 770-8503, Japan.

Ureteral stricture and obstruction following ureteroscopy are often difficult to treat. We report successful laser endoureterotomy using the cut-to-the-light technique for complete obstruction. A 44-year-old man developed complete ureteral obstruction at the ureteropelvic junction following transurethral ureterolithotripsy. Read More

IJU Case Rep 2022 May 17;5(3):183-185. Epub 2022 Mar 17.

Department of Urology and Andrology Kansai Medical University Hirakata Osaka Japan.

Introduction: Ureteral fibroepithelial polyps are extremely rare and cause ureteropelvic junction obstruction in the pediatric population. Recent advancements in endoscopic treatment, such as holmium:yttrium-aluminum-garnet laser, have created more options for practitioners to treat multiple ureteral fibroepithelial polyps cases. However, the use of holmium:yttrium-aluminum-garnet laser multilobulated ureteral fibroepithelial polyps may have technical difficulties. Read More

J Robot Surg 2022 Apr 29. Epub 2022 Apr 29.

Section of Gastroenterology, Hepatology and Nutrition, Center for Pediatric and Adolescent Comparative Effectiveness Research, Indiana University School of Medicine, Indianapolis, IN, 46202, USA.

Robotic-assisted pyeloplasty (RAP) is a mainstay in the treatment of ureteropelvic junction obstruction (UPJO) in children. At our institution, to limit planned operating rooms visits we have placed a ureteral stent with an external string (SWES) immediately prior to RAP. In this study, we sought to quantify the operative time, complications, and costs associated with this approach compared to the traditional approach, requiring subsequent stent removal in the operating room. Read More

Cir Pediatr 2022 Apr 1;35(2):85-90. Epub 2022 Apr 1.

Donostia University Hospital. San Sebastian (Spain).

Objective: Traditionally, double J stent removal in pediatric patients has required cystoscopy under general anesthesia. Magnetic stents allow for double J stent removal without the need for anesthesia. This work describes our initial experience with these stents. Read More

Paediatr Anaesth 2022 Apr 27. Epub 2022 Apr 27.

Université de Paris, Paris, France.

Oxf Med Case Reports 2022 Apr 19;2022(4):omac034. Epub 2022 Apr 19.

Division of Urology, Department of Surgery, Tishreen University Hospital, Latakia, Syria.

Giant hydronephrosis is an ultimate rare urologic entity; even rarer when it is secondary to a duplex collecting system. Duplex collecting system is a common urologic anomaly with a wide range of clinical symptoms and a variety of associated urologic abnormalities such as an ectopic ureter, ureterocele, vesicoureteral reflux and ureteropelvic junction obstruction. This report presents a case of an 8-year-old boy who had a bilateral duplex collecting system that was revealed accidentally by a bilateral severe hydronephrosis. Read More

Int J Surg Case Rep 2022 May 30;94:107005. Epub 2022 Mar 30.

Department of Urology, Faculty of Medicine University of Padjadjaran, Hasan Sadikin Hospital Bandung, Bandung, West Java, Indonesia.

Introduction: Kidneys are one of the most commonly affected retroperitoneal organ in trauma cases despite its relatively well-protected location. Renal trauma occurs in 80-95% of urogenital trauma cases and 8-10% of abdominal blunt trauma. Renal trauma in hydronephrotic kidney due to ureteropelvic junction obstruction (UPJO) is a rare entity, despite of high risk of trauma urogenital due to large size and thin parenchyma. Read More

Diagnostics (Basel) 2022 Apr 6;12(4). Epub 2022 Apr 6.

Department of Obstetrics and Gynecology, Yuri-Kumiai General Hospital, Akita 015-8511, Japan.

Although giant hydronephrosis (GH) associated with ureteropelvic junction obstruction (UPJO) is extremely rarely detected in pregnant women, diagnostic methods, therapeutic approaches, and perinatal management have not been established. A 31-year-old Japanese primipara had a 15 cm × 12 cm multi-cystic mass in the right abdomen detected by transabdominal ultrasound at gestational week 26. Magnetic resonance imaging revealed that the mass was right renal GH. Read More

Methods 2022 Jul 15;203:78-89. Epub 2022 Apr 15.

Department of Electronic Engineering, Tsinghua University, China. Electronic address:

As a common cause of hydronephrosis in children, ureteropelvic junction obstruction (UPJO) may lead to a series of progressive renal dysfunction. Ultrasonography is a primary screening of UPJO, yet its further examinations are laborious, time-consuming, and mostly radioactive. The deep learning based automatic diagnosis algorithms on UPJO or hydronephrosis ultrasound images are still rare and performance remains unsatisfactory owning to limitation of manually identified region of interest, small dataset and labels from single institution. Read More

Can J Urol 2022 04;29(2):11116-11118

Department of Urology at University of Arkansas for Medical Sciences, Little Rock, Arkansas, USA.

Eagle-Barrett Syndrome (EBS) is a rare congenital condition characterized by the triad of absent or defective abdominal wall muscles, urinary tract abnormalities, and bilateral cryptorchidism. Ureteropelvic junction obstruction (UPJO) is seldom reported in these patients, despite it being a common cause of childhood obstructive uropathy. We present the case of a patient with EBS who was subsequently identified as having symptomatic UPJO that was successfully treated with robotic pyeloplasty. Read More

Can Urol Assoc J 2022 Apr 11. Epub 2022 Apr 11.

Department of Urology, Louisiana State University Health Shreveport, Shreveport, LA, United States.

Introduction: Retained ureteral stents may constitute a technical challenge. The purpose of this study was to analyze the patient population with retained ureteral stents with regards to stent sizes to better understand if these factors could play a pivotal role in their encrustation.

Methods: After institutional review board approval, we retrospectively analyzed the data of patients who underwent multimodal surgical procedures for the removal of retained ureteral stents from 2010-2018. Read More

Minerva Urol Nephrol 2022 Jun 6;74(3):384-386. Epub 2022 Apr 6.

Department of Oncologic, Minimally-Invasive Urology and Andrology, Careggi Hospital, University of Florence, Florence, Italy.

J Laparoendosc Adv Surg Tech A 2022 Mar 28. Epub 2022 Mar 28.

Department of Urology, Ataturk University Medical Faculty, Erzurum, Turkey.

The aim of this study was to compare the efficacy, safety, and the clinical and perioperative outcomes of two-dimensional (2D) and three-dimensional (3D) laparoscopic imaging systems in adult patients undergoing laparoscopic pyeloplasty in our clinics due to ureteropelvic junction (UPJ) obstruction. A total of 46 adult patients who had undergone laparoscopic pyeloplasty due to UPJ obstruction were included in the study. Cases that had undergone the operation before January 2019 were retrospectively evaluated with the 2D imaging systems. Read More

Children (Basel) 2022 Feb 22;9(3). Epub 2022 Feb 22.

Department of General and Visceral Surgery, Klinikum, D-73730 Esslingen, Germany.

A pediatric robotic pyeloplasty has been performed with the Senhance robotic system for the first time in January 2021 on a 1.5-year-old girl with symptomatic ureteropelvic junction stenosis. A Senhance robotic system (Asensus Surgical Inc. Read More

Bioengineered 2022 04;13(4):8676-8688

Department of Pediatric Urology, The First Affiliated Hospital of Xinjiang Medical University, Urumqi, China.

Interstitial Cells of Cajal (ICC) plays a critical role in the peristaltic contractions of the gastrointestinal and urinary tract. The dysfunction and loss of ICC contributes to hypokinetic disease, such as gallstoneand ureteropelvic junction obstruction . In the present study, we identified the underlying driving molecular signals of oxidative stress and apoptosis in ICC. Read More

J Laparoendosc Adv Surg Tech A 2022 Mar 18. Epub 2022 Mar 18.

Department of Urology, Lanzhou University Second Hospital, Lanzhou, China.

To compare the outcomes of secondary minimally invasive pyeloplasty (MIP) versus primary MIP for the patients with ureteropelvic junction obstruction (UPJO). We searched all the literature of PubMed, Web of Science, EMBASE, and Cochrane Library comparing secondary MIP and primary MIP and performed a systematic review and meta-analysis. We included 15 studies involving 1637 patients with 1371 in the primary MIP group and 266 in the secondary MIP group. Read More

Case Rep Urol 2022 2;2022:9813052. Epub 2022 Mar 2.

Department of Obstetrics and Gynecology, St. Paul's Hospital Millennium Medical College, Addis Ababa, Ethiopia.

[This corrects the article DOI: 10.1155/2021/9900560.]. Read More

Front Pediatr 2022 25;10:802741. Epub 2022 Feb 25.

Department of Urology, Children's Hospital of Chongqing Medical University, Chongqing, China.

Purpose: The purpose of this study is to provide a new strategy for non-cystoscopic double J urethral stent (JJS) removal, the transurethral retrograde fishing the double J urethral stent (TURFJJS), that avoids general anesthesia in pediatric populations.

Methods: We retrospectively reviewed the JJS removal records of patients having ureteropelvic junction obstruction (UPJO). We analyzed differences in the removal success rates, operation-related severe complications, total cost, duration, and parental satisfaction between TURFJJS and traditional cystoscopic double J urethral stent removal (CJJSR) procedures. Read More

J Indian Assoc Pediatr Surg 2022 Jan-Feb;27(1):25-31. Epub 2022 Jan 11.

Department of Nuclear Medicine, Postgraduate Institute of Medical Education and Research, Chandigarh, India.

Objectives: The objective of this study is to compare the changes in renal function and drainage following open dismembered pyeloplasty with and without renal pelvis reduction.

Materials And Methods: Randomized prospective study of children with ureteropelvic junction obstruction undergoing pyeloplasty with (Group 1) and without (Group 2) pelvis reduction over an 18-month period. Postoperative function and drainage were assessed by ethylene dicysteine (EC) scan and intravenous urography (IVU) and renal pelvis size by ultrasonography. Read More