Delusions of parasitosis with fatal outcome.

The case of a 40-year-old man with delusions of parasitosis as the presentation of a monodelusional psychosis is reported. In spite of treatment with pimozide and depot neuroleptics the patient committed suicide. Since the introduction of pimozide, this drug has come to be regarded as the specific treatment for this disorder; this case is presented to emphasize the fact that not all cases respond, and that the disorder can have a fatal outcome.