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.
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