title: Extraneural sclerosing perineurioma of the buccal mucosa: a case report and clinicopathologic review.
abstract: The perineurioma is an infrequently encountered benign peripheral nerve sheath tumor composed of a clonal proliferation of perineurial cells. Rare cases of perineurioma have been reported in the oral cavity. An extraneural sclerosing perineurioma arising in the buccal mucosa of a 17-year-old male is presented. Histopathologically, the tumor is composed of a well circumscribed nodular proliferation of spindle cells arranged in a storiform growth pattern, in some areas subtly arranged around vascular channels. The tumor cells reveal positive immunostaining for epithelial membrane antigen (EMA), collagen type IV and vimentin, and negative immunostaining for S-100 protein, consistent with a perineurial origin. To the best of our knowledge, this case represents the first report of an extraneural sclerosing perineurioma involving the oral cavity.
authors.affiliation: Department of Pathology, Harvard Vanguard Medical Associates, 133 Brookline Ave., Boston, MA 02215, USA. Vikki_Noonan@vmed.org
authors.forename: Vikki L
authors.initials: VL
authors.lastname: Noonan
authors.forename: David J
authors.initials: DJ
authors.lastname: Greene
authors.forename: Gilbert
authors.initials: G
authors.lastname: Brodsky
authors.forename: Sadru P
authors.initials: SP
authors.lastname: Kabani
mesh_terms: D000293:Adolescent; D014408:Biomarkers, Tumor / Q000378:metabolism; D024141:Collagen Type IV / Q000378:metabolism; D006801:Humans; D008297:Male; D009061:Mouth Mucosa / Q000378:metabolism / Q000473:pathology*; D009062:Mouth Neoplasms / Q000378:metabolism / Q000473:pathology* / Q000601:surgery; D018396:Mucin-1 / Q000378:metabolism; D018317:Nerve Sheath Neoplasms / Q000378:metabolism / Q000473:pathology* / Q000601:surgery; D012598:Sclerosis / Q000378:metabolism / Q000473:pathology*; D016896:Treatment Outcome; D014746:Vimentin / Q000378:metabolism
chemical_list: D014408:Biomarkers, Tumor; D024141:Collagen Type IV; D018396:Mucin-1; D014746:Vimentin