Childhood disintegrative disorder is a condition in which children develop normally through age 3 or 4. Then, over a few months, they lose language, motor, social, and other skills that they already learned.
Neil K. Kaneshiro, MD, MHA, Clinical Assistant Professor of Pediatrics, University of Washington School of Medicine, Seattle, WA. Also reviewed by David Zieve, MD, MHA, Isla Ogilvie, PhD, and the A.D.A.M. Editorial team.