[A case report of cyclic psychosis].

Cycloid psychoses have a special position in psychiatric classification. Usually they are listed among atypical psychoses, located between the group of schizophrenias and affective psychoses. Nevertheless, there are indications for nosological differentiation of cycloid psychoses from other psychotic conditions. The case of cycloid psychosis of a 38 year old woman with two severe psychotic episodes of mixed, paranoid and affective symptomatology is described. Among the characteristic features of psychotic episodes were acute onset, severe but short course of the episodes and the lack of residual/defect symptoms at outcome. On the basis of this case the differential diagnosis of cycloid psychoses is discussed.