Open Access

RESIDENT’S CORNER

Indiana pouch stone formation caused by a long-forgotten metallic ball bearing

Kenneth G. Nepple, Bernard Fallon

Department of Urology, University of Iowa, Iowa City, Iowa, USA
Address correspondence to Dr. Bernard Fallon, University of Iowa, Department of Urology, 200 Hawkins Drive, 3 RCP, Iowa City, IA 52242-1089 USA

Canadian Journal of Urology 2007, 14(5), 3705-3706.

Abstract

The presence of a foreign body in the urinary tract may serve as a nidus for stone formation. A 40-year-old male was found on CT scan to have a 2.4 cm stone in his Indiana pouch urinary diversion. As the stone was fragmented during endoscopic lithotripsy, a metallic round object was visualized, which was subsequently established to be a metallic ball bearing. Upon questioning after the procedure, the patient reported that 4 years earlier he had been accidentally shot with a blow dart gun and the “miraculous hit” went directly into his Indiana pouch stoma.

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