title: Collision tumour of the stomach.
mesh_terms: D000230:Adenocarcinoma; D000368:Aged; D002296:Carcinosarcoma / Q000175:diagnosis*; D003937:Diagnosis, Differential; D006801:Humans; D007890:Leiomyosarcoma / Q000473:pathology*; D008297:Male; D009378:Neoplasms, Multiple Primary; D013274:Stomach Neoplasms / Q000473:pathology*