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Indiana pouch stone formation caused by a long-forgotten metallic ball bearing
Department of Urology, University of Iowa, Iowa City, Iowa, USA
Oct  2007 (Vol.  14, Issue  5, Pages( 3705 - 3706)
PMID: 17949527


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  • 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