Hello Doctor, my daughters have a very close friend, he is 20 years old and he has a protuberant chest bone. I try to research but it seems to me that the best age to fix his problem was when he was much younger. His parents were very young when they had him. Now they are separated and they never pay attention to his condition. Does he have an alternative? Thank you. My name ys Marie. And just came back here to tell you to put your answer whereever fits better in you.