A case of primary extracranial meningioma of the forearm with bone invasion |
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| Authors: | Hideki Murata Mitsuru Takahashi Tatsuya Takagi Hirohisa Katagiri Ichiro Ito Tsuyoshi Ishida |
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| Affiliation: | (1) Division of Orthopaedic Surgery, Self-Defense Force Fuji Hospital, 481-27 Subashiri, Oyama-cho, Sunto-gun, Shizuoka 410-1431, Japan;(2) Division of Orthopaedic Oncology, Shizuoka Cancer Center Hospital, 1007 Shimonagakubo, Nagaizumi-cho, Sunto-gun, Shizuoka 411-8777, Japan;(3) Division of Pathology, Shizuoka Cancer Center Hospital, 1007 Shimonagakubo, Nagaizumi-cho, Sunto-gun, Shizuoka 411-8777, Japan;(4) Department of Pathology and Laboratory Medicine, National Center of Neurology and Psychiatry, Kohnodai Hospital, 1-7-1 Kohnodai, Ichikawa, Chiba 272-8516, Japan |
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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. |
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| Keywords: | Extracranial meningioma MRI Forearm Soft tissue tumor |
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