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Intraneural perineurioma involving the ulnar nerve
Author(s) -
Hamazaki Shuji,
Fujiwara Kazuo,
Okada Shigeru
Publication year - 2004
Publication title -
pathology international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.73
H-Index - 74
eISSN - 1440-1827
pISSN - 1320-5463
DOI - 10.1111/j.1440-1827.2004.01634.x
Subject(s) - nerve sheath neoplasm , pathology , anatomy , cd34 , perineurium , medicine , nerve sheath tumor , immunohistochemistry , biology , schwannoma , malignant peripheral nerve sheath tumor , stem cell , peripheral nerve , genetics
Intraneural perineurioma is a rare peripheral nerve sheath tumor consisting of intraneural proliferation of neoplastic perineurial cells. Clinical and pathological findings of a perineurioma involving the ulnar nerve is presented. A 7‐year‐old girl presented with a 2 year history of weakness and atrophy of the right hand muscles. Physical examination and imaging study revealed a pea‐sized tumor in the ulnar side of the right forearm. At surgery, a fusiform swelling of the ulnar nerve was found and an excisional biopsy of the lesion was performed. Light microscopy revealed numerous whorls consisting of concentric layers of spindle cells encircling the nerve fibers. The proliferating cells were immunoreactive for vimentin, epithelial membrane antigen and glucose transporter protein 1 (Glut1), but negative for S‐100 protein and CD34. Ultrastructural examination revealed features of perineurial cell differentiation. The current study suggests that Glut1 is a useful marker of intraneural perineurioma.