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The Korean Journal of Pathology 1994;28(2): 185-190.
Microcystic Meningioma: A case report.
Gyeong Sin Lee, Il Seon Lee, Bang Hur, Man Ha Hur
1Department of Pathology, Kosin Medical College, Pusan, Korea.
2Dongrae BongSaeng Hospital, Pusan, Korea.
Microcystic meningioma, a distinct morphological variant of meningiomas, is histologically characterized by a vacuolated appearance with multiple cystic spaces lined by vacuolated or stellate-shaped tumor cells. We report a case of microcystic meningioma occuring in right frontoparietal area of 42-year-old woman, with emphasis on differential diagnosis, along with a review of literatures. Immunohistochemically, most of the tumor cells demonstrated positive immunoreactivity for both epithelial membrane antigen and vimentin. Electron microscopy showed that the extracellular space was extensive, where eletron-lucent material was occasionally seen. The tumor cells had long cytoplasmic processes showing complex interdigitation and a large number of desmosomes.
Key Words: Microcystic meningioma; Immunohistochemistry; Electron microscopy
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