title: [Retroperitoneal tumor on the left side: double stomach].
abstract: We report about an uncertain retroperitoneal tumor on the left side without certain origin. During surgery and proved by histological data we found a heterotopic second stomach, an extremely rare abnormality.
mesh_terms: D002828:Choristoma / Q000175:diagnosis* / Q000000981:diagnostic imaging; D003937:Diagnosis, Differential; D006801:Humans; D011859:Radiography; D012186:Retroperitoneal Neoplasms / Q000175:diagnosis*; D013270:Stomach / Q000002:abnormalities*
vernacular_title: Retroperitonealer Tumor links: Magen-Duplex.