Residual Patopaque in renal cysts: an addition to the differential diagnosis of intra-abdominal heavy-metal densities.

Single or multiple heave-metal densities seen on abdominal radiographs give rise to several diagnostic possibilities. These include pills or foreign bodies in the gastrointestinal tract, barium in colonic diverticula, and bullets or shrapnel. This communication describes two patients in whom heave-metal densities observed on abdominal radiographs were caused by residual Pantopaque from prior renal cyst puncture.