My teenage son (14) was diagnosed almost a year ago. We also searched for over 2 years. His symptoms are sometimes not as clear as other people with spondylitis (he has a lot of stomach trouble). He does have the type of chest pains you describe often, especially toward the end of a flare-up. He also has a lot of aches and pains that move around, in fact until recently his back was the least of his complaints. We are really excited because he has been on sulfasalazine since September and hasn't had a major flare-up since (he was having down and out bouts every few months). It's still early but we're hopeful. Now that you have a diagnosis, I hope your son will improve. Although it's not anything you would choose for him, knowing what it is and how to treat it can be a big help.