My boy is very skinny, so it is not a weight issue, definately a hormone thing. He is also too young for it to be a puberty, he has no other symptoms and has a bone age of only 6 years old, I am getting blood drawn on Monday and then see the endo at the end of the month so I hope I find out what is going on. I visited a gynecomastia website and they referred to CAH as a possible cause or condition which could cause, but I could not find out any other information, I am guessing he is undersuprressed?