MRI scans revealed a large, contrast-enhancing cystic lesion. Intraoperative examination identified an angiomatous nodule within the cyst wall, later confirmed to be the source of ongoing hemorrhage.

BEIJING, CHINA, January 9, 2026 /EINPresswire.com/ — Arteriovenous malformation (AVM) is a vascular disorder in which blood vessels are abnormally formed, causing ...