title: Peripheral primitive neuroectodermal tumor of the parotid gland region: report of a case with fine-needle aspiration findings.
abstract: A case of peripheral primitive neuroectodermal tumor of the parotid gland region in a 38-yr-old woman is reported. She had a 1-yr history of a large, firm, and slightly tender left parotid-region mass. CT scan showed an invasive tumor involving the parotid gland, mandible, infratemporal fossa, and parapharyngeal space. Fine-needle aspiration cytology of the mass showed a highly cellular, poorly cohesive smear pattern exhibiting small cuboidal cells, with fibrillary cytoplasm forming occasional rosette-like structures. Numerous intact single cells with fragile cytoplasm, finely granular chromatin, and inconspicuous nucleoli were present together with free-lying nuclei in the background. Histologic, immunohistochemical, and ultrastructural findings confirmed the diagnosis. Diagn. Cytopathol. 2000;22:161-166. Published 2000 Wiley-Liss, Inc.
authors.affiliation: Department of Pathology, University of Arkansas for Medical Sciences, Little Rock, Arkansas, USA.
authors.forename: J C
authors.initials: JC
authors.lastname: Helsel
authors.forename: R E
authors.initials: RE
authors.lastname: Mrak
authors.forename: E
authors.initials: E
authors.lastname: Hanna
authors.forename: D H
authors.initials: DH
authors.lastname: Parham
authors.forename: R H
authors.initials: RH
authors.lastname: Bardales
mesh_terms: D000328:Adult; D014408:Biomarkers, Tumor / Q000032:analysis; D001707:Biopsy, Needle; D003593:Cytoplasm / Q000648:ultrastructure; D005260:Female; D006801:Humans; D007150:Immunohistochemistry; D008279:Magnetic Resonance Imaging; D018241:Neuroectodermal Tumors, Primitive, Peripheral / Q000737:chemistry / Q000000981:diagnostic imaging / Q000473:pathology*; D010306:Parotid Gland / Q000737:chemistry / Q000000981:diagnostic imaging / Q000473:pathology* / Q000601:surgery; D010307:Parotid Neoplasms / Q000737:chemistry / Q000000981:diagnostic imaging / Q000473:pathology*; D014057:Tomography, X-Ray Computed
chemical_list: D014408:Biomarkers, Tumor