A case of de Cléambault syndrome, secondary to paranoid schizophrenia, in a Saudi woman is documented. Cultural factors were found ineffective in modifying or preventing symptoms. Erotomania appeared to arise from the same dynamics as those of the Western patients and to follow the same pattern.

A case of delusional parasitosis is presented in which a patient with classic symptoms of six years' duration responded to pimozide. Similarly chronic cases may be responsive to pimozide.

A case of a 21-year-old woman with subacute sclerosing panencephalitis presenting with paranoid schizophreniform symptoms is presented. The relationship between viral encephalitis and psychiatric symptoms is briefly considered.

The authors present two patients with neurosyphilis who presented with psychiatric disorders and who both benefited from penicillin therapy. Increases in such cases may be expected.

In a case of NMS subsequent to administration of trifluperidol to a young man, the patient responded remarkably quickly to bromocriptine. The authors point out the deficiencies in the diagnostic criteria, which need further refinement for a better understanding of the syndrome.