[A Case of Primary Angiosarcoma of the Small Intestine Triggered by Gastrointestinal Bleeding].

An 87-year-old man with complaints of palpitations and digestive bleeding previously visited another hospital. He was referred to our hospital because of anemia. Small bowel endoscopy revealed an elevated lesion with bleeding from the ileum. Partial resection of the small intestine was performed, and small intestinal angiosarcoma was diagnosed. The patient was referred to another hospital upon his request. Radiotherapy was performed for tertiary chest metastases. Nine months after the surgery, the patient visited our hospital with hematochezia. Surgery was performed because of suspected recurrence at the anastomotic site. Histopathological examination confirmed the recurrence of angiosarcoma of the small intestine. The patient is currently undergoing outpatient observation. Angiosarcoma has a poor prognosis, although it is important to select the appropriate treatment according to the patient's age and general condition.