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.
Arachnoid cysts are the most common type of brain cyst. They're not tumors, but cysts filled with cerebrospinal fluid (a clear liquid that surrounds your brain and spinal cord). Most people who have ...