2025 Volume 67 Issue 8 Pages 1355-1360
An 88-year-old female was admitted to our hospital with a primary complaint of recurrent hematochezia. CS revealed elevated submucosal tumor-like lesions at the splenic flexure, whereas contrast-enhanced CT revealed abnormal vascular growth and staining of the colon wall in the lesion. Abdominal angiography revealed a dilated left branch of the middle colic artery, peripheral nest-like abnormal vascular growth, and early appearance of the draining vein. Based on these findings, the lesion was diagnosed as a colonic arteriovenous malformation, and embolization of the feeding artery was performed. A subsequent CS revealed flattening of the lesion without concomitant mucosal ischemic changes. Following embolization, the hematochezia resolved and the patient was discharged without any adverse events. Vascular embolization is a viable treatment approach for colonic arteriovenous malformations and CS is a valuable tool for monitoring the efficacy of embolization and detecting concomitant ischemic adverse events.
