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I.はじめに
巨大脳動脈瘤のparent arteryが完全に閉塞されることは極めて稀であり,現在まで中大脳動脈閉塞の1例10)と後大脳動脈閉塞の2例4)8),計3例のみが報告されているにすぎない.
最近著者らは,parasellar syndromeを呈し,通常の脳血管撮影では内頸動脈がほぼ完全に閉塞された所見のみが認められ,prolonged injection angiographyによりはじめて巨大脳動脈瘤が造影され,それが内頸動脈の完全に近い閉塞の原因と考えられた1例を経験したので報告する.
A case of giant intracranial aneurysm which almost completely occluded the internal carotid artery and was diagnosed angiographically by prolonged injection technique was reported.
A 62-year-old house-wife was admitted to the Department of Neurosurgery of The Asahi General Hospital, complaining of headache, nausea, and left ptosis. Neurological examination revealed left IInd, IIIrd, IVth, and VIth cranial nerve palsy. Films and laminagrams of the skull demonstrated the double floor of the sella trucica. Plain CT scan showed an oval high density area without surrounding low density area in the left middle cranial fossa.
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