[Role of melatonin in human physiology and pathology. II. Involvement of melatonin in pathogenesis of affective and chronobiological disorders. Melatonin and the aging process. Melatonin and neoplasms].

In the second part of this review the role of melatonin in pathogenesis of affective diseases and chronobiological disorders is discussed. Current views on melatonin involvement in aging are presented. Clinical experiments on the possible usefulness of melatonin in treatment of various types of cancers and hypothetical mechanisms of oncostatic influence of melatonin are also summarized.