[Schizoaffective psychoses: review of nosographic concepts and longitudinal clinical study].

A through review of the literature relating to the schizoaffective psychoses was undertaken; the considerable variety of criteria used for diagnosis accounts for the diversity of the results obtained by various researchers. In order to identify a homogeneous group of schizoaffective patients, four parameters, on which the literature is in agreement were formulated. These have enabled us to isolate 27 schizoaffective subjects and to compare them with two control groups: 25 cases of schizophrenia and 26 cases of maniac-depressive psychosis. On the basis of the symptomatological and social variables considered (age of onset, cultural level, social adaptation, family history, early and recent events, response to short-term pharmacological treatment, symptomatology during the observation period), we believe that we are able to distinguish schizoaffective subjects from both schizophrenic and dysthymic subjects.