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Metaplastic Meningioma Overspreading the Cerebral Convexity
Yun Hyeok Choi1, Chan Young Choi2, Chae Heuck Lee1
1Department of Neurosurgery, Ilsan Paik Hospital, College of Medicine, Inje University, Goyang, Korea.
Abstract:
Meningioma is relatively common, benign, and extra-axial tumor accounting for about 20% of primary brain and spinal cord tumors. The World Health Organization (WHO) classified these tumors into Grade I (benign), Grade II (atypical), and Grade III (anaplastic) meningioma. Grade I meningioma which is slowly growing tumor and have some rare subtypes. Among them, metaplastic subtype is defined as a tumor containing focal or widespread mesenchymal components including osseous, cartilaginous, lipomatous, myxoid or xanthomatous tissue, singly or in combinations. We report a rare metaplastic meningioma overspreading nearly whole cerebral convexity from main extra-axial tumor bulk in the parietal lobe.
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