title: Fine needle aspiration cytology of primary epidermoid cyst of the brain.
abstract: The cytologic features of a primary epidermoid cyst of the brain diagnosed by intraoperative fine needle aspiration cytology are reported. The cytomorphologic findings included numerous anucleated squames, polarizable cholesterol crystals and a few squamous cells with keratohyaline granules. This case demonstrated the efficacy of using both the Diff-Quik and Papanicolaou stains in evaluation of cystic lesions of the brain. A discussion of the expected aspiration cytologic findings of other cystic cerebral lesions is also presented.
mesh_terms: D000328:Adult; D001707:Biopsy, Needle; D001927:Brain Diseases / Q000378:metabolism / Q000473:pathology*; D002784:Cholesterol / Q000378:metabolism; D003460:Crystallization; D004814:Epidermal Cyst / Q000378:metabolism / Q000473:pathology*; D006644:Histiocytes / Q000473:pathology; D006801:Humans; D008297:Male
chemical_list: D002784:Cholesterol