Hampel N, Kursh E D, Persky L
Urology. 1978 Jul;12(1):67-8. doi: 10.1016/0090-4295(78)90371-0.
An unusual late complication of ileal conduit diversion is described. To our knowledge this is the first case reported in which a foreign body apparently migrated from an ileal conduit to the renal pelvis and served as a nidus for stone formation.