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I.はじめに
頭蓋内内頸動脈または中大脳動脈狭窄症に対し,浅側頭動脈—中大脳動脈吻合術(以下 STA-MCA bypass)を施行した後,もとの狭窄部位が閉塞に転化する現象があることはよく知られているが2,4-6),浅側頭動脈—上小脳動脈吻合術(以下STA-SCA bypass)後の報告は極めて少ない.今回われわれは脳底動脈狭窄症に対しSTA—SCA bypass術を施行した後,脳底動脈の狭窄性病変が閉塞に転化し脳幹部穿通枝領域に脳梗塞をきたした症例を経験したので報告する.
Abstract
A case of basilar artery occlusion after STA-SCA bypass surgery is reported. The patient was a 56 year old male and presented a TIA of vertigo and speech disturbance. The preoperative angiogram revealed se-vere stenosis of the basilar artery in its midportion be-tween the bifurcation of AICA and that of SCA. After surgery, the patient's clinical course was uneventful, but the angiogram showed that the previous stenotic segment of the basilar artery had been occluded and the distal portion of the basilar artery and its branches were perf used through the widely-patent STA-SCA bypass.
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