Related Experiment Video
Updated: Mar 1, 2026

Mouse Bladder Wall Injection
Published on: July 12, 2011
Jack stone in the bladder: case report of a rare entity
Duminda Subasinghe1, Serozsha Goonewardena2, Vickneswaran Kathiragamathamby2
1Department of Urology, The National Hospital of Sri Lanka, Colombo, Sri Lanka. dumindas1982@yahoo.com.
Background:
Jackstone is a bladder stone that has a similar appearance to toy jacks. However review of the English language medical literature revealed only a few previous reports of jackstone calculus.
Case Presentation:
We report a case in which a large jackstone calculus was incidentally detected during the evaluation of 67 year old male presenting with lower urinary tract symptoms. X-Ray kidney, ureter, bladder showed a large irregular shaped radio-opaque shadow in the pelvic region. He underwent cystolitholapaxy and transurethral resection of the prostate.
Conclusion:
It is important to recognize the characteristic shape of the urinary bladder calculi in the diagnosis of the jack stones and to treat the primary cause of calculi formation.
Related Concept Videos
Urinary Tract Calculi II: Pathophysiology and Clinical Manifestations
Anatomy of the Genitourinary System II: Bladder and Urethra
Urinary Bladder
In males, the bladder is situated in front of the rectum, while in females, it is positioned anterior to the vagina and uterus. The bladder floor contains an inverted triangular area called the trigone, defined by the two ureteric...
Urinary Tract Calculi I: Introduction
Urinary Tract Calculi VI: Surgical Management
Imaging Studies VI: Voiding Cystourethrography and Cystography

