Case Report

Head and Neck Pathology

, Volume 4, Issue 2, pp 169-173

Extraneural Sclerosing Perineurioma of the Buccal Mucosa: A Case Report and Clinicopathologic Review

  • Vikki L. NoonanAffiliated withDepartment of Pathology, Harvard Vanguard Medical Associates Email author 
  • , David J. GreeneAffiliated withOral and Maxillofacial Surgery, Private Practice
  • , Gilbert BrodskyAffiliated withDepartment of Pathology, Harvard Vanguard Medical Associates
  • , Sadru P. KabaniAffiliated withDepartment of Pathology, Harvard Vanguard Medical Associates

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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.


Extraneural perineurioma Sclerosing perineurioma Benign peripheral nerve sheath tumor