Eating Disorders are characterized by gross alterations in eating behavior. Although they appear in two separate sections of DSMIV, all Eating Disorders were grouped together in this chapter since they cover conditions found in infants, children, and adolescents. DSM-IV departed from DSM-III-R in its organization of these disor ders. Anorexia Nervosa and Bulimia Nervosa were moved out of the childhood disorders section and, along with a new category, Eating Disorder NOS, make up a new Eating Disorders category in the "adult" section. Some Eating Disorders remain in the childhood disorders, now appropriately retitled "Feeding and Eating Disor ders of Infancy or Early Childhood." They include Pica, Rumination Disorder, and a new category called Feeding Disorder of Infancy or Early Childhood-all characterized by eating and feeding distur bances that occur very early in life, whereas anorexia and bulimia are typically adolescent phenomena. This was part of the rationale for independent treatment of these disorders since the diagnoses apply to quite different types of patients.