Your patient is a 11-year-old boy who is distracted, hyper, and irritable. He talks excessively in class, and there are signs of impulsivity. Last week he climbed to the roof of the school to throw tennis balls into the parking lot. Is this a case of attention deficit hyperactivity disorder (ADHD), bipolar disorder, or something else? In this slideshow I will look at 7 questions that help clarify the picture.