The challenges of the diagnosis make it unclear whether the condition is outgrown or simply becomes better managed, experts say...There is no simple answer, said Thomas Power, director of the center for management of A.D.H.D. at Children’s Hospital of Philadelphia, and the senior author of the study. He was one of eight experts I consulted, and while they fell into different camps on whether someone can outgrow A.D.H.D., they all agreed that the answer is complicated.