Adam Rainer was born in 1899 to average sized parents and by the age of 18, Rainer only measured 4 feet and 0.25 inches. He was considered way too short to join the army for WWI, and medically speaking he was declared to be a dwarf. The strange thing that may have been an indication of things to come was that his medical records also show that he had remarkably large hands and feet.
Everything changed when he turned 21, Rainer started to grow and a huge rate. He was growing so fast that it became scary, alarming his family. He skyrocketed from 4’10” to be over 7 feet. And during this decade of huge growth that never stopped, Rainer developed a severe spinal curvature. It was then that doctors realized he was suffering from a rare disease called Acromegaly. This disorder happens when the pituitary gland starts to produce too much growth hormones.
In fact, it is a condition that only affects about 6 people out of 100,000. And it was not until he was 31 that Rainer even found out that he had the condition when a brain surgeon discovered a tumor was pressing against his pituitary gland. They were able to remove his tumor, but it was too late, the damage had been done. Even though the velocity of his growth did slow down after this.
Acromegaly is actually when your soft tissues start to swell so this means that your hands, feet, nose, lips, and ears will all become extremely enlarged also. Rainer grew at 3.6 inches per year, which caused him to be bedridden as he was unable to stand without assistance. When he died at the age of 51, he measured 7’8” and this is the only person ever to be classified as a dwarf and a giant.