CT cisternography of dolichoectatic arterial compression of the optic chiasm.

Dolichoectasia of the distal internal carotid arteries and the proximal anterior cerebral arteries is a well recognized abnormality. The angiographic and computed tomographic (CT) findings have been described [1-8]. Arterial enlargement has been implicated in chiasmal and optic nerve syndromes [1, 3-9]. We report a symptomatic patient with chiasmal deformity and associated arterial dolichoectasia who was examined using high-resolution CT (GE CT/N 8800, ReView) with metrizamide cisternography.