Until recently, bipolar disorders were almost never diagnosed in children and rarely recognized in adolescents, even though between 20 and 40 percent of the two million or more adults diagnosed with bipolar disorders in the United States experienced the onset of illness in their teen years or before. Psychiatrists now recognize that manic depression has frequently been misdiagnosed as ADHD (or oppositional defiant disorder, conduct disorder, or depression). According to recent data, 23 percent of children currently diagnosed with ADHD will evenutally be diagnosed as having a bipolar...