Related Experiment Video
Updated: Jul 26, 2026

Assessing Urinary Tract Junction Obstruction Defects by Methylene Blue Dye Injection
Published on: October 12, 2017
A rare cause of urinary retention in A child: A case report
Maher Al-Hajjaj1, Ahmed Tawosh2, Ahmed Osman Adam Bary3
1Department of Urology, Aleppo University Hospital University of Aleppo, Aleppo, Syria.
Abstract:
A Ten-year-old child presented to our emergency department with acute urinary retention. Three months ago, he was diagnosed with right renal hydronephrosis with renal calculus. Firstly, right nephrostomy was inserted. Next, he had been treated with ESWL for right renal stone in another center. After unsuccessful attempts for urethral catheterization, he was brought to the operating room for meatotomy and calculus extraction. An impacted urethral stone was detected at this point. He had a successful extraction of the stone. A six-month follow-up period has passed with no recurrence. This shows that although they are uncommon, urethral stones do happen.
Related Concept Videos
The Micturition Reflex
The process begins with bladder filling, where the bladder wall stretches as urine accumulates. This stretching activates the urine storage reflex, mediated by the sacral spinal segments and the pontine storage center. Efferent sympathetic impulses stimulate the detrusor muscle to relax and the internal urethral sphincter to contract, facilitating urine...
Disorders of the Urinary System
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...
Nursing Assessment of the Genitourinary System I: Health History
Nursing Assessment of the Genitourinary System II: Inspection and Palpation
Urinary Tract Calculi II: Pathophysiology and Clinical Manifestations
Urinary Tract Calculi V: Nursing Management

