At age 18 months the doctors realized that he hadn't grown any, he was still the size of a six month old baby.
Age refers to the test done to determine the childs age as compared to the normal bone density.
His mother was told by doctors that his bones probably wouldn't grow, but his organs would, and this could cause an early death. Christopher's Symptons 1.His right leg is 1 inch longer than his left leg. He is 2 years old, and weighs 20 to 24 pounds. He doesn't talk, but he does make sounds. He is learning sign language and doing very well with it.