A case of primary extracranial meningioma of the forearm with bone invasion.
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.
Murata
Hideki
H
Division of Orthopaedic Surgery, Self-Defense Force Fuji Hospital, 481-27 Subashiri, Oyama-cho, Sunto-gun, Shizuoka, 410-1431, Japan. hm.lucky@k6.dion.ne.jp
Takahashi
Mitsuru
M
Takagi
Tatsuya
T
Katagiri
Hirohisa
H
Ito
Ichiro
I
Ishida
Tsuyoshi
T
D000368:Aged; D001859:Bone Neoplasms / Q000175:diagnosis*; D003287:Contrast Media; D003937:Diagnosis, Differential; D005260:Female; D005542:Forearm; D019786:Gadolinium DTPA; D006801:Humans; D007150:Immunohistochemistry; D008279:Magnetic Resonance Imaging; D008579:Meningioma / Q000175:diagnosis*; D011884:Radius / Q000473:pathology
D003287:Contrast Media; D019786:Gadolinium DTPA