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Affective phases developing in personality disorder (index-sample--98 patients) were compared to those in cyclothymia (85 patients--control group). A preference of phase dynamics in the group of abnormalities relating to ICD-10 item "Borderline personality disorder" was confirmed. In line with a concept considering personality disorders as clinical syndromes, patients of the index-group have personality disorders with the signs of psychopathological diathesis determined by vulnerability to affective disorders. Affective phases are interpreted not only as an expression of a specific type of personality disorders dynamics but as an emergence of affective pathology, which is alternative to endogenous one both by modus of constitutional predisposition and clinical parameters (egosyntonic moderating of the phase, domination of negative affectivity in its structure, amphitymic duality of pathologically altered affect).

Using clinical and psychopathological method, 134 patients who met the ICD-10 criteria of diagnosis of schizoaffective psychosis (F25), were examined. Relatively small prognostic informative value of standard schizoaffective psychosis differentiation into affective- and schizo-dominant types was found. Subtyping of schizoaffective psychosis according to peculiarities of delusion formation in the picture of the disease attacks proved to be more significant. Given clinico-psychopathological features of circular affective and delusional disorders and their pathokinesis, as well as dynamics types and disease outcome, a schizoaffective psychosis systematization has been elaborated. That includes 3 nosologic types: "nuclear" type with non-progressive phase dynamics; "marginal" (intermediate) type and schizoaffective type of attack-like progressive schizophrenia. The concept of nosologic independence of schizoaffective psychosis ("nuclear" type) is discussed.