Article

Soft Tissue Perineurioma in a Patient With Neurofibromatosis Type 2: A Tumor not Previously Associated With the NF2 Syndrome

Department of Orthopaedic Surgery and Rehabilitation, Vanderbilt University, Нашвилл, Michigan, United States
American Journal of Surgical Pathology (Impact Factor: 4.59). 01/2007; 30(12):1624-9. DOI: 10.1097/01.pas.0000213340.70852.d4
Source: PubMed

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.

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    • "Although the tumors are not associated with neurofibromatosis type 1 or 2, a case of soft tissue perineurioma in a patient with neurofibromatosis type 2 has been reported.3 Additionally, some studies have described that fluorescence in situ hybridization and molecular analysis demonstrate deletions or point mutations on the chromosome 22q11 in the region of the NF2 gene and chromosome 10. "
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