title: [Primary leiomyosarcoma of the duodenum. Apropos of 2 cases with different presenting forms].
mesh_terms: D000368:Aged; D004379:Duodenal Neoplasms / Q000150:complications* / Q000473:pathology; D005260:Female; D006471:Gastrointestinal Hemorrhage / Q000209:etiology; D006801:Humans; D007890:Leiomyosarcoma / Q000150:complications* / Q000473:pathology; D008297:Male; D008551:Melena / Q000209:etiology
vernacular_title: Leiomiosarcoma primitivo del duodeno. A propósito de dos casos con forma de presentación diferente.