Cerebral cysticercosis presenting as progressive dementia.

Cysticercosis is a parasitic infestation that commonly affects the central nervous system. This is a report of an elderly man who presented with progressive dementia, labelled as Alzheimer's in whom diffuse cerebral cysticercosis was subsequently demonstrated. The dementia responded favorably to treatment with steroids and mebendazole. This report demonstrates the importance of excluding cerebral cysticercosis as a treatable cause of progressive dementia.