Hi. Well, that's a little confusing, isn't it? I'd have guessed that normally, if a boy has advanced bone age that he'd also have onset of puberty early. Both of my sons actually started puberty around their 12th birthday. So, he's at the age in which he'd normally be starting as commonly happens at 12. What prompted the testing? Is he small in stature? What did the doctor say? I would highly recommend an endocrinologist.