title: Cycloid psychoses as atypical psychoses: 'concordance' and 'discordance'.
abstract: The term 'atypical psychosis' coined by Mitsuda in 1942 describes a group of psychosis that show similarities to schizophrenia as well as manic-depressive diseases. It is controversial whether it refers to a uniform group of diseases exposing typical characteristics. According to Leonhard a typical uniform group of cycloid psychoses can be contrasted with a group of atypical schizophrenias. The position of the so-called atypical psychoses in the sense of a nosological position within the classification systems of different psychiatric schools will be analyzed and discussed.
authors.affiliation: Osaka Institute of Clinical Psychiatry, Kyoto, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Fukuda
mesh_terms: D001714:Bipolar Disorder / Q000145:classification / Q000175:diagnosis* / Q000523:psychology; D003937:Diagnosis, Differential; D006801:Humans; D011569:Psychiatric Status Rating Scales; D011618:Psychotic Disorders / Q000145:classification / Q000175:diagnosis* / Q000523:psychology; D012559:Schizophrenia / Q000145:classification / Q000175:diagnosis*; D012565:Schizophrenic Psychology