title: Malignant tumors of the small intestine.
mesh_terms: D000230:Adenocarcinoma / Q000453:epidemiology; D000367:Age Factors; D002276:Carcinoid Tumor / Q000453:epidemiology; D004379:Duodenal Neoplasms / Q000453:epidemiology; D006801:Humans; D007414:Intestinal Neoplasms / Q000453:epidemiology* / Q000601:surgery; D007417:Intestinal Polyps / Q000453:epidemiology; D007421:Intestine, Small; D007889:Leiomyoma / Q000453:epidemiology; D007890:Leiomyosarcoma / Q000453:epidemiology; D008223:Lymphoma / Q000453:epidemiology; D009362:Neoplasm Metastasis; D011379:Prognosis; D012737:Sex Factors