Published in:
01-06-2007 | Case Report
A case of primary extracranial meningioma of the forearm with bone invasion
Authors:
Hideki Murata, Mitsuru Takahashi, Tatsuya Takagi, Hirohisa Katagiri, Ichiro Ito, Tsuyoshi Ishida
Published in:
Skeletal Radiology
|
Issue 6/2007
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Abstract
We report here a rare case of primary extracranial meningioma in a 73-year-old woman with an asymptomatic mass located in the left distal-dorsal forearm. MRI revealed the lesion to be poorly circumscribed and unclear, with iso-signal intensity to muscle on T1 and with a relatively high signal intensity on T2-weighted imaging. The histopathology of the specimen from incision biopsy was typical of meningioma, showing bland spindle cell proliferation with a whorling pattern. Immunohistochemically, the tumor cells were positive for epithelial membrane antigen and vimentin, and negative for S-100 expression.