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I.はじめに
頭蓋内くも膜嚢胞は,Computed Tomograpy(CT)導入以来,発見される機会が多くなってきたが,後頭蓋窩くも膜嚢胞についての報告は少なく,その大部分は正中部又は小脳橋角部に発生する.この度われわれは,初回のCTスキャンでは診断不能で,Magnetic ResonanceImaging(MRI)にて診断された,lateral cerebellomedullary cisternのくも膜嚢胞を経験し,手術で良好な結果を得たので,若干の文献的考察を加えて報告する.
We experienced a rare case of arachnoid cyst in the right cerebellomedullary cistern. A 59-year-old female was admitted to our clinic because of lower cranial nerve palsy (deviation of uvula to the left side, swallowing disturbance, curtain sign, hoarseness, atrophy of the right sternocleidomastoid muscle, and deviation of the tongue to the right side). MRI demonstrated a mass lesion compressed towards the medulla oblongata in the right cerebellomedullary cistern. MRI was very helpful as a diagnostic tool, since there is no bone object in the posterior fossa.
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