Visual loss in cysticercosis: analysis of 23 patients.

Of 23 cases with cysticercal visual loss, 13 had optic neuropathy (due largely to papilledema), 4 sustained chiasmal damage, and 6 had retrochiasmal lesions. Papilledema usually was associated with hydrocephalus, chiasmal involvement was caused by inflammation and compression from adjacent cysts, and retrochiasmal damage was produced by large parenchymal cysts or vasculitic cerebral infarction.