The diagnosis of bipolar disorder in children rose an alarming 40-fold during the decade ending in 2004, according to a new study in the Archives of General Psychiatry. Are children victims of a new epidemic of mental illness? Is this condition being wildly over-diagnosed? Or is the truth somewhere in between? The author of the new study will give us his answer, and discuss what physicians can do when they suspect a young patient might have bipolar disorder. Hosted by Paul Raeburn.