患者女性,68岁。因反复便血4年入院。4年前开始无诱因反复出现柏油样黑便或暗红色血便,每3～4月1次,出血量大时需输血治疗,曾3次行急诊胃镜检查,2次全消化道钡餐Ｘ线检查均未发现异常。1年前曾行剖腹探查术,从胃至直肠反复查找未见病变。入院时体检:除中度贫血貌外无异常发现。 Female patient, 68 years old. Repeated blood in the hospital for 4 years. Four years ago, there was no incentive to reappear tarry black stools or dark red bloody stools. Once every three to four months, blood transfusion was needed to treat patients with large amounts of bleeding. Three times of emergency gastroscopy were performed, and two full-digestive barium meal X-ray examinations were performed. No abnormalities were found. A laparotomy was performed 1 year ago, and no lesion was repeatedly found from the stomach to the rectum. Physical examination on admission: No abnormalities were found except moderate anaemia.