Vascular Gastrointestinal Lesions By Parswa Ansari, MD, Hofstra Northwell-Lenox Hill Hospital, New York Reviewed / Revised May 2023 View Patient Education Symptoms and Signs Diagnosis Treatment Key Points Topic Resources Angiodysplasia Gastric Antral Vascular Ectasia... Dieulafoy Lesion Several distinct congenital or acquired syndromes involve abnormal mucosal or submucosal blood vessels in the gastrointestinal tract.