Abstract
A 68-year-old female with a past history of diabetes mellitus, hypertension, and hyperlipidemia was hospitalized due to subarachnoid hemorrhage for which coil embolization was performed. After the procedure, she had left lower abdominal pain and discharge of blood. We performed colonoscopy and made a diagnosis of arteriovenous malformation (AVM) with a diameter of about 15 mm in the rectum due to the finding of centripetally collecting vessels with pulsation. A region enhanced in the early phase was found in the wall of the rectum by abdominal CT, and the collecting vessels to which blood flowed through the superior rectal artery were found by 3DCT. Because the patient had rectal bleeding intermittently we performed transcatheter arterial embolization (TAE). Abdominal angiography revealed a distended artery, nidus, and early venous return. The patient was treated successfully with TAE using coils and n-butyl 2-cyanoacrylate. Vessels disappeared and a small ulcer was found by colonoscopy 7 days after TAE. No discharge of blood was observed subsequently.
