The British Journal of Psychiatry 130: 134-138 (1977)
© 1977 The Royal College of Psychiatrists
Folie a quatre
A Sims, P Salmons and P Humphreys
A case of folie a quatre is described affecting a proband and his wife,
sister and brother. The three family members retained their symtoms of
paranoid schizophrenia. The wife was not mentally ill and her delusions
disappeared in time (folie imposee). Coincidentally, there were several
cases of Huntington's chorea amongst her relatives. Different categories of
folie a deux are demonstrated in the various family members and
relationships.