[Nosological aspects of paranoid psychoses].

The author stresses the lack of nosological entities in psychiatry, and also the necessity of a classification system. Paranoid symptoms are found in most types of psychoses, both functional and organic psychoses. Among the functional psychoses the schizophrenias often have a paranoid picture, and paranoid traits may be found even in the affective psychoses. The Scandinavian concept of reactive psychoses is presented, including reactive psychoses is presented, including reactive psychoses of paranoiac, paranoid and schizophreniform type. Finally, the author presents his own personal follow-up study of paranoid psychoses after an observation time of 5-18 years. This study demonstrates 81% cured, of the patients with the discharge diagnosis of reactive psychoses, as against 23% cured, of the patients with the discharge diagnosis of schizophrenia. The author suggests a continuum of the paranoid psychoses from the schizophrenias via the schizophreniform and paranoid reactive psychoses to the more affective psychoses with slight tendency to paranoid symptomatology.