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July 1978

Isolated Oculomotor ParalysisThe Product of Saccular and Fusiform Aneurysms of the Basilar Artery

Author Affiliations

From the Bascom Palmer Eye Institute, Departments of Ophthalmology (Drs Trobe and Glaser) and Radiology (Dr Quencer), University of Miami (Fla), School of Medicine.

Arch Ophthalmol. 1978;96(7):1236-1240. doi:10.1001/archopht.1978.03910060070014

• Isolated oculomotor paralysis was produced by an unsuspected saccular basilar aneurysm in one case and fusiform basilar aneurysm in another. The chronicity of symptoms and lack of pain were misleading features. The saccular basilar aneurysm, which has an untreated mortality of 50% to 80%, was visualized best with selective angiography and successfully clipped intracranially. The fusiform basilar aneurysm, part of a diffuse atherosclerotic ectasia of all basal intracranial arteries, indented and displaced the upper brain stem. A common ophthalmologic sign of posterior communicating aneurysms, oculomotor paralysis has not been documented frequently with basilar aneurysms.