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[Aneurysm within the optic nerve. Case report].

In a group of 65 aneurysms of the anterior communicating artery treated in the years 1977 to 1984 in the Department of Neurosurgery, Medical Academy in Katowice in one case the aneurysm had an atypical situation penetrating into the optic nerve. A similar case of an aneurysm of the internal carotid artery was reported in the Polish literature only by Tokarz et al. in 1977.