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Ⅰ.はじめに
くも膜下出血subarachnoid hemorrhage(以下SAH)診断のガイドラインによると,CTおよび髄液検査ともに陰性であればSAHは否定される.
今回われわれは,CTおよび髄液検査とも陰性であった症例に対し,緊急fluid attenuated inver-sion recovery image(以下FLAIR)を施行しSAHと診断することができ,さらにmagnetic reso-nance angiography(以下MRA),拡散強調画像diffusion weighted image(以下DWI)と灌流強調画像perfusion weighted image(以下PWI)が脳血管攣縮と脳虚血の評価にも有用であった亜急性期SAHの1例を経験したため,若干の文献的考察を加え報告する.
We reported a case of subacute subarachnoid hemorrhage with watery clear cerebrospinal fluid. Emergent mag-netic resonance image was useful not only for diagnosis by fluid attenuated inversion recovery image but also for evaluation of cerebral ischemia and vasospasm by magnetic- resonance angiography, diffusion weighted image and per-fusion weighted image. A 50-year-old man presented disturbance of consciousness and dysarthriti. Neither computed tomographic scan nor cerebrospinal fluid study could diagnose subarachnoid hemorrhage clearly.
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