Gigantism

Gigantism, also known as giantism (from Greek γίγας gigas, "giant", plural γίγαντες gigantes), is a condition characterized by excessive growth and height significantly above average. In humans, this condition is caused by over-production of growth hormone in childhood before the long bone epiphyses closes resulting in persons between 7 feet (2.13 m) and 9 feet (2.74 m) in height.