Interesting that you mention your son was on steroids. My daughter is asthmatic (since 18 mos) and has taken inhaled steroids for many years (she is now 14). She is currently under w/ for OCD. Her knee xrays indicate this, she is now scheduled for an MRI. I raised the question if this was steroid related and was told that probably not but unsure if any studies have been done. Where did you get the steroid link information?