title: Soft tissue perineurioma in a patient with neurofibromatosis type 2: a tumor not previously associated with the NF2 syndrome.
abstract: Neoplasms that commonly affect patients with neurofibromatosis type 2 (NF2) include schwannomas, meningiomas, astrocytomas, ependymomas, and neurofibromas. Perineuriomas are rare tumors of the peripheral nerve sheath that share some characteristics with meningioma. As in both NF2-associated and sporadic cases of schwannoma and meningioma, perineuriomas often harbor mutations or deletions of the NF2 gene. However, perineuriomas have not previously been reported in the clinical setting of NF2. A 30-year-old man with a history of bilateral vestibular schwannomas, a parasagittal meningioma, an intraspinal ependymoma, and multiple other neoplasms involving both cranial and peripheral nerves (thereby fulfilling the diagnostic criteria for NF2) presented with an enlarging thigh mass. The diagnosis of cellular soft tissue perineurioma was confirmed by both immunohistochemical and ultrastructural analysis. This case represents the first report of a soft tissue perineurioma arising in the setting of NF2.
authors.affiliation: Department of Pathology, Vanderbilt University Medical Center and Vanderbilt University School of Medicine, Nashville, TN 37232, USA.
authors.forename: Clovis W
authors.initials: CW
authors.lastname: Pitchford
authors.forename: Herbert S
authors.initials: HS
authors.lastname: Schwartz
authors.forename: James B
authors.initials: JB
authors.lastname: Atkinson
authors.forename: Justin M M
authors.initials: JM
authors.lastname: Cates
mesh_terms: D000328:Adult; D014408:Biomarkers, Tumor / Q000032:analysis; D003593:Cytoplasm / Q000648:ultrastructure; D003937:Diagnosis, Differential; D006801:Humans; D008297:Male; D009378:Neoplasms, Multiple Primary; D018317:Nerve Sheath Neoplasms / Q000737:chemistry / Q000150:complications* / Q000175:diagnosis / Q000473:pathology / Q000601:surgery; D016518:Neurofibromatosis 2 / Q000150:complications* / Q000473:pathology; D010524:Peripheral Nervous System Neoplasms / Q000175:diagnosis; D012983:Soft Tissue Neoplasms / Q000737:chemistry / Q000150:complications* / Q000473:pathology / Q000601:surgery
chemical_list: D014408:Biomarkers, Tumor