Intraosseous microcystic meningioma |
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| Authors: | Sumika Okamoto Masanori Hisaoka Takatoshi Aoki Chitoshi Kadoya Satoshi Kobanawa H. Hashimoto |
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| Affiliation: | (1) Department of Pathology and Oncology, School of Medicine, University of Occupational and Environmental Health, 1-1 Iseigaoka, Yahatanishi-ku, Kitakyushu 807-8555, Japan, JP;(2) Department of Radiology, School of Medicine, University of Occupational and Environmental Health, Kitakyushu, Japan, JP;(3) Department of Neurosurgery, School of Medicine, University of Occupational and Environmental Health, Kitakyushu, Japan, JP |
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| Abstract: | Extradural ectopic meningioma is a rare tumor. We report on an example of microcystic meningioma arising in the skull of an elderly woman. Radiological examination revealed a localized osteolytic lesion in the left parietal bone. At surgery, it was discovered that the tumor was located within the skull without any evidence of extraosseous extension. The light microscopic, immunohistochemical and ultrastructural features were consistent with a microcystic variant of meningioma. To our knowledge, this is the first case of an intraosseous microcystic meningioma, and we believe that this type of meningioma should be considered in the differential diagnoses of myxoid bone tumors of the calvarium. Received: 10 January 2000 Revision requested: 21 February 2000 Revision received: 8 March 2000 Accepted: 13 March 2000 |
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| Keywords: | Intraosseous meningioma Microcystic meningioma Parietal bone X ray CT MRI |
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