脳室内嚢胞性髄膜腫の1例

A Case of Intraventricular Cystic Meningioma

I．はじめに

　側脳室に生じる髄膜腫は全髄膜腫中1-2％の頻度と報告されており，更にこの中で嚢胞形成を呈するものは，極めて稀である．われわれは左側脳室体部に主座を置く嚢胞形成を伴った髄膜腫の1例を経験したので若干の文献的考察を加え報告する．

　We report a case of intraventricular cystic meningioma in the left lateral ventricle. A-44-year-old male patient was admitted with headache on November 25, 1991. Neurological examination revealed acalculia and left homonymous hemianopsia. CT and MRI showed a solid tumor which originated in the body of the left lateral ventricle, and which was associated with a cystic component postero-laterally. Tumor stains fed by the left anterior chroidal artery and the medial and lateral posterior chroidal arteries by angiography. The tumor was totally removed via the lateral temporal parietal approach. Histological examination revealed meningotheliomatous meningioma in the solid tumor and only gliosis in the wall of the cyst.