RESUMO
Angiodysplasia is a vascular lesion of the gut, which reveals intestinal bleeding as a major symptom. It is the cause of as much as 5~6% of the intestinal bleeding of unkown origin. Pathologically, it reveals anomalous submucosal vascular overgrowth, which is characterized by tortuous, dilated and thin-walled vessels. Because the lesion is mainly submucosal. It is hard to diagnosis with endoscopy and even in laparotpmy. Angiography has a low detection rate for angiodysplasia, but some of this typical findings are delayed excretion of dye into the venous structure around the lesion, vascular tuft in the arterial phase, and accelerated dye secretion into venous structure in the situation of arteriovenous malformation. Endoscopy, especially colonoscopy is so effective a diagnostic method as to make interventional therapy. Conjugated estrogen therapy is effective and is regarded as choice of treatment in the not-life-threatening intestinal bleeding caused by angiodysplasia. Surgery is only indicated in the case of uncontrolled bleeding. Intestinal obstruction has rarely been reported as another manifestation of intestinal angiodysplasia. Therefore pathologic definition should be confirmed, and research for pathophysiology of mucosal hypertrophy in the angiodysplasia is needed.