Lilliputian and negative hallucinations in a patient with probable encephalomyelitis disseminata.

A patient who showed Lilliputian hallucinations and negative hallucinations in the course of probable disseminated encephalomyelitis is described. At the age of 14 years the patient experienced a transient, flaccid paresis of the right leg. Eighteen years later she suddenly developed paranoid-hallucinatory symptoms accompanied by atypical visual hallucinations. She did not recover completely and until now she has suffered at least once every year from an episode with psychotic symptoms. During the most recent of these episodes, MRI revealed several disseminated supra- and infratentorial foci in the brain. Two of them, in the left cerebral peduncle and in the left occipital white matter are discussed as the cause of her visual hallucinatory symptoms.