arachnoid cyst, a fluid-filled cyst between the layers of the leptomeninges, lined with arachnoid membrane, most commonly occurring in the sylvian fissure. Also called leptomeningeal cyst.
arachnoid cyst
arachnoid cyst, a fluid-filled cyst between the layers of the leptomeninges, lined with arachnoid membrane, most commonly occurring in the sylvian fissure. Also called leptomeningeal cyst.