Major Depressive Disorder and Bipolar I or II Disorder appear to be more common among first-degree biological relatives of persons with Cyclothymic Disorder than among the general population. There may also be an increased familial risk of Substance-Related Disorders. In addition, Cyclothymic Disorder may be more common in the first-degree biological relatives of individuals with Bipolar I Disorder.
Cyclothymic Disorder Familial Pattern
Key points
- Major Depressive Disorder and Bipolar I or II Disorder appear to be more common among first-degree biological relatives of persons with Cyclothymic Disorder than among the general population.
- There may also be an increased familial risk of Substance-Related Disorders.
- In addition, Cyclothymic Disorder may be more common in the first-degree biological relatives of individuals with Bipolar I Disorder.
Revised and edited by
David Mazoor, M.D.
Medically reviewedLast reviewed
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