title: Malignant tumors of the small intestine.
mesh_terms: D001062:Appendectomy; D003937:Diagnosis, Differential; D007414:Intestinal Neoplasms / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000601:surgery; D007421:Intestine, Small / Q000503:physiopathology*; D007890:Leiomyosarcoma / Q000473:pathology; D008228:Lymphoma, Non-Hodgkin / Q000473:pathology; D010437:Peptic Ulcer / Q000175:diagnosis; D011379:Prognosis; D011859:Radiography; D012701:Serotonin / Q000032:analysis
chemical_list: D012701:Serotonin