Arachnoid Cyst of the Middle Cranial Fossa: Axial CT scans. Note the large, left sided cystic lesion. Also, note the mild mass effect on the left hemisphere (i.e. compression of the left frontal lobe ...

These cysts develop on the arachnoid membrane. This membrane covers the brain and spinal cord along with two other membranes. Cysts that grow on the arachnoid membrane are usually benign and ...

Ohio State coach Urban Meyer said an enlarged congenital arachnoid cyst on his brain has led to "aggressive" headaches and that his condition played a role in him dropping to his knees in an ...