Schizo-affective psychoses lead more often to reintegration of the paranoid-hallucinatory pattern than schizophrenic psychoses. The author interprets schizo-affective psychoses in the light of his systematic psychopathology and concludes that excitation is intensified in comparison with cyclothymia. Ego destruction is more serious, but paranoid manifestations decrease in the course and emotional syndromes become more pronounced. Prognosis depends on the intensity of therapeutic efforts in the sense of psycho-pharmacological and supportive therapies and is not prestabilized.