Delayed reduplicative paramnesia.

A 25-year-old man with a remote history of closed head injury and left hemiparesis developed the false belief that his hospital was located in another city, close to his home. This delusion appeared more than 3 years after his injury, from which he had made a good recovery. No previous delusional or other psychotic thinking had occurred. Clinical and neuropsychological data supported the existence of right hemisphere and bifrontal pathology. This case illustrates that a specific delusional belief may arise in a patient with appropriate cerebral pathology years after the initial event.