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Ⅰ.はじめに
海綿状血管腫は中枢神経系のいずれの部位にも認められる血管奇形であり,近年MRIの普及によりその報告例は増加傾向にある.脳幹部海綿状血管腫の正確なnatural historyはいまだ明らかにされていないが,他の部位のものに比べ出血率は高いといわれており4,15),致命的な出血となることもある.
今回われわれは水頭症で発症し,手術療法を行った四丘体部海綿状血管腫の1例を経験したので,文献的考察を加えて報告する.
We report a surgical case of tectal cavernous malformartion presented by hydrocephalus. This 30-year-old man suf-fered from headache and nausea due to an obstructive hydrocephalus caused by a cavernous malformation in the tec-tum. Magnetic resonance (MR) images on admission showed a small lesion depicted as isointensity on the T1-weighted image, hyperintensity on the T2-weighted image, and accompanied with peripheral low-signal intensity rim, suggesting a tectal cavernous malformation. After admission, ventricular drainage was performed and the patient's symptoms improved immediately.
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