I know that adults with CF are more prone to Osteoporosis, but is it true for kids also? Has anyone's kids been tested for it or treated for it? And does it have anything to do with being PI or PS?The reason I'm asking is that we found out this week that my son has a stress fracture above his knee (<b>very</b> long story, but he's actually had the fracture for three weeks). Now this is the same leg he had bone surgery on in June, but it was not anywhere near the surgery site. He also has Cerebral Palsy which can make him more prone to Osteoporosis so not sure which diagnosis to blame it on. Nothing major occurred that I can think of to cause the fracture. The Ortho wants to do a bone density test in a few weeks.