Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Disorders of the Urinary System

Disorders of the Urinary System

The urinary system is responsible for eliminating waste and excess fluids from the body. However, disorders of the urinary system can arise due to various reasons like infections, stress, age, congenital abnormalities, and lifestyle.
Urinary tract infections (UTIs) are one of the most common urinary system disorders. They are caused by bacteria that enter the urethra and can spread to the bladder resulting in cystitis. Pyelonephritis is the result of a UTI that has ascended to the level of the...

Ureters

Ureters

The ureters are retroperitoneal tubes located on either side of the vertebral column. They are responsible for transporting urine from each kidney to the urinary bladder. These tubes have thick walls and are approximately 25-30 cm long. Their diameter is around 10 mm at the renal pelvis, gradually narrowing to 1 mm as the ureter obliquely enters the posterior bladder wall through the ureteric orifices. The shape of these orifices is slit-like, which helps to prevent urine backflow toward the...

Urinary Tract Calculi II: Pathophysiology and Clinical Manifestations

Urinary Tract Calculi II: Pathophysiology and Clinical Manifestations

Renal calculi, commonly termed kidney stones, are crystalline solid masses that form in the kidneys but can occur at any point within the urinary system, encompassing the kidneys, ureters, bladder, and urethra.The pathophysiology of renal stones involves several key factors: supersaturation of the urine with stone-forming constituents, changes in urine pH, a decrease in urine volume, and the presence of substances that promote or inhibit stone formation.Supersaturation of Urine: This is the...

Urinary Tract Calculi V: Nursing Management

Urinary Tract Calculi V: Nursing Management

AssessmentSubjective Data: Obtain a detailed health history, including any recent or chronic urinary tract infections, periods of immobilization, previous episodes of renal calculi, and medical conditions such as gout, benign prostatic hyperplasia, or hyperparathyroidism. Review the medication history for drugs that may influence stone formation, including allopurinol, analgesics, loop diuretics, or thiazide diuretics. Document the use of long-term indwelling catheters and any past surgical...

Acute Kidney Injury II: Pathophysiology

Acute Kidney Injury II: Pathophysiology

Acute kidney injury (AKI) causes are categorized into three primary categories based on the location of the injury: prerenal, intrarenal (or intrinsic), and postrenal causes. This classification guides clinical management and illustrates how different pathways can impair kidney function.Etiology and Pathophysiology of Acute Kidney Injury1. Prerenal causesEtiology: Prerenal Acute Kidney Injury, the most common type, occurs when reduced blood flow to the kidneys decreases filtration capacity...

Urologic Endoscopic Procedure: Cystoscopic Examination

Urologic Endoscopic Procedure: Cystoscopic Examination

Meaning of Cystoscopic Examination:Cystoscopy is an essential diagnostic tool in urology that is used to assess the structure and function of the genitourinary system. It provides a direct view of the urethra, bladder, and, in some cases, the ureteral openings. This procedure helps detect structural abnormalities, infections, cancers, and blockages in the urinary tract. There are two types of cystoscopy:Flexible cystoscopy is commonly performed in outpatient settings due to its less invasive...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by

Same author

Response to: comment on "FOXL2 expression in dysgenetic gonads supports the diagnostic possibility of ovotesticular differences of sex development".

Virchows Archiv : an international journal of pathology·2026

Same author

FOXL2 expression in dysgenetic gonads supports the diagnostic possibility of ovotesticular differences of sex development.

Virchows Archiv : an international journal of pathology·2026

Same author

Rethinking radiation for resected pleomorphic dermal sarcoma: A National Cancer Database analysis.

Journal of the American Academy of Dermatology·2025

Same author

Multidisciplinary Dermatology: A Framework from the Association of Academic Cosmetic Dermatology.

The Journal of clinical and aesthetic dermatology·2025

Same author

Editorial comment on "Decision aid development for shared surgical decision-making in differences of sex development: A review of existing aids".

Journal of pediatric urology·2025

Same author

Revisiting the Anatomy of the Pediatric Uretero-Pelvic Junction Analysis of Intraoperative Video of Robotic-Assisted Pyeloplasty.

Urology·2025

Same journal

Subcutaneous Forehead and Incidental Orbital Varices Diagnosed with MRI Under Sedation.

Journal of radiology case reports·2026

Same journal

Pituitary Metastases from Thyroid Carcinoma: Case Series and Literature Review.

Journal of radiology case reports·2026

Same journal

Isolated Abducens Nerve Palsy: A Rare Manifestation of Recurrent Extramedullary Myeloma.

Journal of radiology case reports·2024

Same journal

A Case Report of Uterine Torsion in a Postmenopausal Female with a Large Leiomyoma.

Journal of radiology case reports·2024

Same journal

The Value of 3D SPACE MRI in Differentiating between Sequestrated Lumbar Disc Herniation and Tumors: Two Cases and Literature.

Journal of radiology case reports·2024

Same journal

Placement of Endovascular Stent for Reperfusion of Cerebral Infarct After Pediatric Traumatic Internal Carotid Artery Dissection.

Journal of radiology case reports·2024

See all related articles

Search research articles

Related Experiment Video

Updated: May 14, 2026

Unilateral Ureteral Obstruction Model for Investigating Kidney Interstitial Fibrosis

Unilateral Ureteral Obstruction Model for Investigating Kidney Interstitial Fibrosis

Published on: April 25, 2025

Ureteral fibroepithelial polyp causing urinary obstruction.

Melissa L Shive¹, Laurence S Baskin, Catherine R Harris

¹UCSF School of Medicine, UCSF Medical Center, San Francisco, CA, USA.

Journal of Radiology Case Reports

|February 1, 2013

Summary

This summary is machine-generated.

Ureteral polyps are a rare cause of ureteropelvic junction (UPJ) obstruction in children. This case highlights a ureteral polyp mimicking a urinary stone, emphasizing the need for broader differential diagnoses in atypical UPJ obstruction.

Keywords:

fibroepithelial polyp pediatric ureteral polyp ureteropelvic junction obstruction

More Related Videos

Assessing Urinary Tract Junction Obstruction Defects by Methylene Blue Dye Injection

Assessing Urinary Tract Junction Obstruction Defects by Methylene Blue Dye Injection

Published on: October 12, 2017

An Immature Murine Model of Reversible Unilateral Ureteral Obstruction

An Immature Murine Model of Reversible Unilateral Ureteral Obstruction

Published on: April 4, 2025

Related Experiment Videos

Last Updated: May 14, 2026

Unilateral Ureteral Obstruction Model for Investigating Kidney Interstitial Fibrosis

Unilateral Ureteral Obstruction Model for Investigating Kidney Interstitial Fibrosis

Published on: April 25, 2025

Assessing Urinary Tract Junction Obstruction Defects by Methylene Blue Dye Injection

Assessing Urinary Tract Junction Obstruction Defects by Methylene Blue Dye Injection

Published on: October 12, 2017

An Immature Murine Model of Reversible Unilateral Ureteral Obstruction

An Immature Murine Model of Reversible Unilateral Ureteral Obstruction

Published on: April 4, 2025

Area of Science:

Pediatric Urology
Urologic Pathology

Background:

Ureteropelvic junction (UPJ) obstruction is a common cause of hydronephrosis in children.
Obstructive uropathy in pediatric patients is frequently attributed to congenital anomalies or calculi.
Ureteral polyps are uncommon benign intraluminal ureteral masses.

Observation:

A 9-year-old boy presented with symptoms suggestive of UPJ obstruction.
Imaging revealed intraureteral calcification at the UPJ and hydronephrosis.
A retrograde pyelogram demonstrated a filling defect consistent with a ureteral polyp causing partial obstruction.

Findings:

The patient was diagnosed with a ureteral polyp causing UPJ obstruction.
The polyp mimicked the presentation of a more common obstructive urinary stone.
Histopathological confirmation of the ureteral polyp was obtained.

Implications:

Ureteral polyps represent a rare but significant differential diagnosis for pediatric UPJ obstruction.
Atypical presentations of UPJ obstruction warrant consideration of less common etiologies.
Early recognition and diagnosis of ureteral polyps are crucial for appropriate management and prevention of renal damage.