DD is 11 and very tall. Growing at an alarming rate and has very mobile joints. Today she was pushed from behind and put her shoulder out (not for the squeamish!). After 5 hours in casualty it is now back, but either shoulder could go at any time, apparently. So no swinging on the monkey bars. Anyone else had experience of this? My dh was tested for Marfans and is clear but he wonders if DD may have this (is a symptom). Any ideas / help much appreciated.