These categories may be applied to describe the presentation and characteristics of mood episodes in the context of Episódio depressivo único, Transtorno depressivo recorrente, Transtorno bipolar tipo I, or Transtorno bipolar tipo II. These categories indicate the presence of specific, important features of the clinical presentation or of the course, onset, and padrão of mood episodes. These categories are not mutually exclusive, and as many may be added as apply.