How is it diagnosed?

If a doctor suspects gigantism in a child, he or she will recommend a blood test to measure levels of The growth hormone and insulin-like growth factor called IGF-1, which is a hormone produced by the liver. The doctor may also recommend an oral glucose tolerance test which is a special beverage containing glucose that the child will drink. Blood samples will be taken before and after the child drinks the beverage. In a normal body, growth hormone levels will drop after eating or drinking glucose. If the child's levels remain the same, it means his or her body is producing too much of the growth hormone. If the blood tests indicate a Pituitary Gland tumor, the child will need an MRI of the gland.