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Medical Definition of Overgrowth syndromes
1. Conditions with multiple abnormalities including excessive growth. Early overgrowth syndromes that affecting children include the fragile x and beckwith-wiedemannn syndromes. Overactivity of the pituitary gland with overproductiuon of growth hormone causes overgrowth before adolescence and a distinctive pattern of overgrowth called acromegaly. (12 Dec 1998)