動脈硬化を伴わない内頸および眼動脈の視神経圧迫による小児一側性視野障害の1例

Unilateral Visual Field Defect due to Optic Nerve Compression by Non-sclerotic Internal Carotid and Ophthalmic Arteries:A case report

I．はじめに

　視交叉部病変はしばしば視野障害を伴うが，この部位の血管による視神経圧迫に基づく視野障害は比較的稀と思われる．今回，われわれは開頭術を行い，内頸および眼動脈が直接視神経を圧迫することにより，一側性の視野障害をきたしたと考えられる小児例を経験したので，文献的考察を加え報告する．

A case of unilateral visual field defect due to optic nerve compression by non-sclerotic internal carotid and ophthalmic arteries was reported.

A 14-year-old boy was admitted to our department because of constricted visual field of the right eye. The right ophthalmic artery originated from more distal portion of the internal carotid artery than usual on angiogram.

CT, PEG and other roentgenologic examinations revealed no abnormalities. But the possibility of para-sellar tumor still remained, so the right optic nerve was explored by a right frontotemporal approach.