On the question of prolonged and chronic depressions (clinical course, dynamics, therapy)
Long-term endogenous depressions are characterized by lacking nosologic specificity and psychopathological and clinical heterogeneity. Typological differentiation of sustained depressions accounting for differences in psychopathological symptoms and symptoms dynamics is discussed. Long-term depressions are subdivided into prolonged and chronic depressions. Therapy principles for prolonged and chronic depressions are summarized.