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Ⅰ.はじめに
Neck clippingが困難な巨大動脈瘤や紡錘状動脈瘤に対する治療としてtrappingや親動脈遮断術が行われているが2,6-8),近年では血管内治療による親動脈閉塞でも良好な成績が報告されている1,3,4).Balloon occlusion test(BOT)により親動脈閉塞後の虚血の予測を行うが,その判定が困難な場合もある1,4).今回,後大脳動脈P2部の未破裂紡錘状動脈瘤に対してBOTにより虚血症状の出現がないことを確認後にGuglielmi detachable coil(GDC)を用い瘤内塞栓および親血管閉塞術を施行したところ,術後数時間してDejerine-Roussy症候群を来した症例を経験したので報告する.
A right posterior cerebral artery (PCA) fusiform aneurysm was incidentally discovered in a 53-year-old man. Al-though the aneurysm was asymptomatic, treatment of the aneurysm was indicated to avoid possible hemorrhage and/or mass effect. Since the patient tolerated temporary balloon occlusion of the right PCA at P1-P2 segments and sufficient collateral flow to the right temporo-occipital region was observed during such occlusion, parent artery oc-clusion as well as intraluminal occlusion of the aneurysm was performed with Guglielmi detachable coils. The patient did not develop neurological deficit immediately after embolization.
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