title: [Case of co-existing duodenal leiomyosarcoma and stomach cancer].
mesh_terms: D000368:Aged; D002285:Carcinoma, Intraductal, Noninfiltrating; D004379:Duodenal Neoplasms; D006801:Humans; D007890:Leiomyosarcoma; D008297:Male; D009378:Neoplasms, Multiple Primary; D013274:Stomach Neoplasms