A case of erotomania in a 75-year-old female with senile dementia of Alzheimer type (SDAT) is described. This case demonstrates the presence of an elaborately systematised delusion in SDAT, and the influence of the progression of SDAT on this delusion.

A woman with Capgras and de Clérambault's syndromes transmitted persecutory, erotic, and somatic delusions to her son in a folie à deux. Capgras and de Clérambault's syndromes appear together more commonly than is apparent in the literature. Review of these cases shows a strong association with severe affective disorder.

Two patients with erotomania (de CIérambault's syndrome) associated with epilepsy and head trauma are presented. The delusion appeared during periods of mania or hypomania and partially remitted during depression or euthymia. Erotomania may be seen in a wide variety of psychotic conditions, including those that are organically based.