Hi all,
I am a 21 year old athlete who had fairly severe OS in my teenaged years. I still have large lumps on my knees and they pain fairly often, ecpecially during/after sports and when sitting with my knee bent for any period of time.
It was originally diagnosed as tendonitis in the ER, but my family doc finally Dxed OS.
I have tried rest and ice, but nothing seemed to help, as rest made the pain go away for the moment, but it was back as soon as I did anything physical. I now just live the pain and call myself an "old man" at the age of 21. I cant wait to see what i'll be like in 20 years!!..lol..
So i hope that answers part of your question, yes there are 21 year olds living with OS