3D-CT diagnosis for ingested foreign bodies.

Ingested foreign bodies can be hard to diagnose but cannot be missed. We report two cases where helical computed tomography (three-dimensional computed tomography) was used for the effective preoperative diagnosis (swallowed fish bone-induced perforation of sigmoid colon and a case of ileus caused by ingested PTP [press-through package]). Other traditional diagnostic methods could not identify the foreign bodies. Three-dimensional computed tomography is useful for the diagnosis of foreign body ingestion and should be used for the difficult cases.