Gigantism and acromegaly are two disorders with the same disease mechanism and somewhat similar presentations. Even though they have the same disease mechanism, the two have entirely different outcome simply due to the age of onset. Gigantism is the result if the disease mechanism starts in childhood.
Adult Velociraptors grew up to 6.8 feet (2 meters) long, 1.6 feet (0.5 meter) tall at the hip and weighed up to 33 pounds (15 kilograms).
Tyrannosaurus rex measures from 37 to 43 feet (11â13 meters) long stands 13 feet (4 m) tall at hips, and weighs between 7 and 9 tons (14,000-18,000 lb), meaning this dinosaur was even bigger than the average African Elephant, and by far the largest carnivore ever in North America.