Cyclothymic disorder *Cyclothymic disorder is characterized by recurrent periods of mild depression alternating with periods of hypomania. *This pattern must be present for at least 2 years (1 year for children and adolescents) before the diagnosis can be made. *During these 2 years, the symptom-free intervals should not be longer than 2 months. Cyclothymic disorder usually stas during adolescence or early adulthood and tends to have a chronic course. *The marked shifts in mood of cyclothymic disorder can be confused with the affective instability of borderline -, personality disorder or may suggest a substance abuse problem.