结肠毛细血管扩张症(vascalar ectaisas of the colon)又称血管发育不良,是老年人下消化道出血原因之一,为1种血管退行性病变,Lewi等将本病分为3种类型,A型为弧立性粘膜下血管畸形,属后天获得性畸形;B型为真正的血管错结构,多为先天性;C型为毛细血管增生扩张,为遗传性,临床上较少见。近年来由于 Vascalar ectasias of the colon, also known as vascular dysplasia, is one of the causes of lower gastrointestinal bleeding in the elderly. It is a type of vascular degenerative disease. Lewi et al. Classify this disease into three types. Type A For the arc of submucosal vascular malformations, is a acquired acquired deformity; B-type real vascular malformations, mostly congenital; C-type capillary proliferation and expansion of hereditary, less common in clinical. In recent years due to