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According to the DSM-IV-TR, to be diagnosed with Cyclothymia a person must experience numerous periods of Hypomania and of depressive states that do not meet full criteria for a Major Depressive Episode for a period of at least 2 years (in children and adolescents, 1 year is sufficient).  During this period, the person will not have been without mood symptoms for more than 2 months at a time.  Also, the person will not have experienced a full Major Depressive Episode, Manic or Mixed Episode during the first 2 years of the disturbance.  In this sense, Cyclothymia is a more chronic but low-grade form of Bipolar Disorder than Bipolar I or II Disorder.  


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Bipolar II Disorder

Bipolar Spectrum & Bipolar Disorder NOS