Homonymous Hemianopsia Caused by Chiasmal Compression Due to Intracranial Aneurysm

Abstract

Two cases of homonymous hemianopsia caused by chiasmal compression due to intracranial aneurysm are presented. Both cases are aneurysms of the internal carotid artery and these aneurysms developed to the median direction. Visual field defects in both cases were incongruous homonymous hemianopsia without macular sparing. It should be noted that when homonymous hemianopsia is present without any signs of an intracranial mass, the existence of a nonruptured aneurysm should be highly considered. © 1978, The Japan Neurosurgical Society. All rights reserved.