Cisternography and CT Scanning with111In-DTPA in Evaluation of Posterior Fossa Arachnoid Cysts

摘要

A patient with a large, long-standing posterior fossa arachnoid cyst was evaluated. Computed tomography was used to demonstrate the cyst.111In-DTPA cisternography demonstrated the communication of the cyst with the subarachnoid space, stasis of the111In in the cystic space, and incomplete ascent of cerebrospinal fluid over the cerebral hemispheres.