title: Intraneural reticular perineurioma of the neck.
abstract: Perineuriomas are infrequent tumors that may be intraneural or extraneural in soft tissue with no apparent relation with a nerve. Some cases of soft tissue perineurioma may have a retiform pattern, but this pattern has not been described to date in intraneural perineurioma. We report a case of a unique perineurioma arising in a nerve of the neck that had a distinctive reticular pattern and was intraneural. The patient was a 21-year-old woman who had a lump on the left side of the neck abutting the vena jugularis. The tumor had features of both reticular perineurioma and intraneural perineurioma with pseudo-onion bulb pattern. The tumor cells were positive for epithelial membrane antigen. The patient is free of tumor 6 months after operation.
authors.affiliation: Department of Pathology, Hôpital Saint-Antoine, APHP, Paris, France.
authors.forename: Anne S
authors.initials: AS
authors.lastname: de La Jarte-Thirouard
authors.forename: Isabelle
authors.initials: I
authors.lastname: Jacquier
authors.forename: Paul P
authors.initials: PP
authors.lastname: de Saint-Maur
mesh_terms: D000328:Adult; D005260:Female; D006258:Head and Neck Neoplasms / Q000378:metabolism / Q000473:pathology*; D006801:Humans; D007150:Immunohistochemistry; D018317:Nerve Sheath Neoplasms / Q000378:metabolism / Q000473:pathology*; D010524:Peripheral Nervous System Neoplasms / Q000378:metabolism / Q000473:pathology*