my son aged 13 is one of the twins.he was born with umblical hernia and urinary reflex which got cured. Then he had developmental delays and mild intellectual disability . He was leading a normal life but suddenly now he is having a problem with walking..his posture is becoming very different...his knees are running each other and he is gaining lot of height. So I had taken him to a Ortho doctor who said that his knees are very weak and this condition is called patella Alta where the knee cap moves up. So in future surgery would be the only option..I cannot imagine my child with a knee surgery..if anyone had been or seen these conditions in some child I need hope that my child would live a healthy life.