Has anyone had one? My DD who is only twelve has and needs an athroscopy. Apparently, it's very unusual at her age but was done during netball. She's had it for over a year and it's only been recently diagnosed. It locks about twice a month and she is in agony until she can manouvere it out which takes about ten mins. It doesn't stop her doing sport she just can't cross her leg. Anyone had the surgery or even an athroscopy that can give me some clarity?