Primary malignant neoplasms of the small bowel.
D000230:Adenocarcinoma / Q000175:diagnosis; D002277:Carcinoma / Q000175:diagnosis; D006801:Humans; D007421:Intestine, Small; D007890:Leiomyosarcoma / Q000175:diagnosis; D009362:Neoplasm Metastasis / Q000175:diagnosis; D011379:Prognosis