Migraine-like visual phenomena associated with cerebral venous thrombosis.

Two adults presented with new-onset migrainous-type visual disturbances and had angiographically demonstrated filling defects near the torcular Herophili. Neither patient had a visual field deficit nor cerebral computed tomography evidence of an occipital infarction. The association of migraine-like visual phenomena with cerebral venous thrombosis may provide insight into the pathogenesis of migraine.