Excessive growth, resulting from heredity, diet, or growth regulation disorder.
growth hormone
usually due to a tumour
causes pituitary gigantism (see {{link=pituitary gland">pituitary gland ). With gradual but continuous growth, height may reach 8 ft (240 cm), with normal proportions. Greater susceptibility to infection, injury, and metabolic disorders shortens the life span. Surgery or radiation can be employed to curtail further growth. Gigantism often occurs with acromegaly .