If you go back to the beginning of this web site and click on the MedlinePlus Medical Encyclopedia, there is a passage that says both boys and girls with cah will be tall as children but significantly shorter than normal as adults. im not sure if that will explain things since he is a teenager now, and im not sure how long he has been shorter than normal. my son is 4 and has a bone age of 8. before reading the passage and knowing his size now i thought that my son would without a doubt be tall like his father who is 6ft3".