病例报告患者，男，５７岁。主因暗红色血便４年，加重１个月入院。无慢性胃炎等病史。查体：腹平软，未触及包块，直肠指诊：距肛门４ｃｍ可触及肿块，大小０．５ｃｍ，可活动，无触痛，指套无血染。结肠气钡双对比造影：回肠与升结肠交界处内侧缘回盲瓣处有一不规则充盈... Case report patient, male, 57 years old. The main cause of dark red blood was 4 years and he was admitted to the hospital one month later. There is no history of chronic gastritis. Physical examination: abdomen soft, untouched mass, rectal examination: 4cm from the anus can touch the mass, size 0.5cm, can move, no tenderness, fingertips without blood. Double-contrast angiography: There is an irregular filling of the ileocecal valve at the medial border of the ileum and ascending colon.