Capgras syndrome, de Clérambault's syndrome, and folie à deux.

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.