My 4 year old daughter has had the bump on her sternum ever since I could remember. She does complains about it, its never elevated or tender but her doctor just brush if off like it's nothing. I found this post while doing my own research about this matter. It does bother me. I'm a little scard. So far no anwers, I guess I must take the act and seek help. A chest exray will be a good start.
Please let me know your update --todays date is 3/23/09