Dwarfism is due to hyposecretion of growth hormone (GH) in children, skeletal growth and sexual maturity are arrested. They attain a maximum height of 4 feet only. Gigantism is due to hypersecretion of growth hormone (GH) in children. Overgrowth of the skeletal structure occurs (up to 8 feet) and the visceral growth is not appropriate with that of limbs.
Acromegaly is due to excessive secretion of growth hormone in adults. Overgrowth of hand bones, feet bones, jawbones, malfunctioning of gonads, enlargement of viscera, tongue, lungs, heart, liver, spleen, and endocrine gland-like thyroid, adrenal, etc., are the symptoms of acromegaly.