[Identical psychosis of a monocygous twin set--a case report (author's transl)]

This is a report about a pair of identical twins with identical symptoms of a similar to schizophrenic psychosis. The course of the disease with special reference to the influence by each other and a similar and a dissimilar treatment is described. This disease is subgrouped to the symbiontic psychoses. Nosology, aetiology and psychodynamic aspects are discussed.