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J Korean Neurosurg Soc. 2003 Oct;34(4):382-385. English. Case Report.
Cho JH , Yang KH , Zhang HY , Kie JH .
Department of Neurosurgery, Yonsei University College of Medicine, Seoul, Korea.
Department of Neurosurgery, National Health Insurance Corporation Ilsan Hospital, Goyang, Korea.
Department of Pathology, National Health Insurance Corporation Ilsan Hospital, Goyang, Korea.

Microcystic meningioma is a rare variant of meningiomas. This unusual variant was originally described by Masson, who labeled it "humid". The computed tomographic scan or magnetic resonance images of these tumors resemble those of a glial or metastatic tumor with cystic or necrotic changes. There is no definitive method for differentiating cystic meningiomas from these more common tumors. But immunohistochemically, they share a similar pattern of positive staining for epithelial membrane antigen and vimentin with other meningiomas. Our case was a 34-year-old woman with a tumor mass on the right frontal area. She was admitted to hospital because of generalized tonic seizure. Grossly all of the tumor could be removed, and histopathologically this tumor was revealed to be a microcystic meningioma.

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