In a 32-yr-old man, an infratentorial cystic lesion with a mural nodule it-
as interpreted to be either a hemangioblastoma or a cystic astrocytoma on C
T scan. Intraoperative crush cytology revealed it to be a choroid plexus pa
pilloma (CPP). The utility of crush cytology in the rapid diagnosis of cent
ral nervous system (CNS) tumors and the differential diagnosis of CNS papil
lary lesions are highlighted in this report. (C) 2001 Wiley-Liss, Inc.