Disorders of physical development, usually in the first years of life, characterized by overly rapid growth. Children with overgrowth syndromes usually demonstrate delayed motor, cognitive, and social development, in addition to reduced muscle tone and impaired speech development. Some syndromes are genetic disorders, and others are caused by tumors. Symptoms vary according to the disorder.
A general term for a group of disorders of childhood physical development in which head circumference and height are larger than normal, and there is a tendency to develop malignant tumors.