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Ⅰ.はじめに
中枢神経系に発生するgangliogliomaは比較的稀な腫瘍であり,全脳腫瘍の約0.2%と報告18)されている.特に小脳に発生したgangliogliomaは稀で,頭蓋内原発gangliogliomaのなかで2〜9.0%14,19,21)を占めるにすぎない.
最近われわれは大部分が嚢胞性分で占められた小脳gangliogliomaの1例を経験した.渉猟し得た範囲内でかつ記載が明確であった過去16例1,2,4-6,9-12,15-17,20)に,われわれの経験した1例を加えた17例について検討し,小脳gangliogliomaの画像を中心とした臨床的特徴を報告する.
Gangliogliomas represent approximately 0.2% of all the intracranial tumors. Ganglioglioma arising from the cere-bellum is rare, with a rate of 1.5-9% of CNS gangliogliomas. The authors report a case of cerebellar ganglioglioma with a huge cyst. A 28-year-old man presented headache and ataxia. Computerized tomography (CT) demonstrated a huge cyst at the vermian region with calcification located at the peripheral side of the cyst. Magnetic resonance imag-ing (MRI) with administration of Gd-DTPA showed a slightly enhanced small mass at the left side of the cyst. Preop-erative diagnosis of the lesion seemed to be a cystic astrocytoma.
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