My brother fell off bunk beds - mum took him up to hospital - he had it X-rayed they said it was fine and to go home and let him rest (he was 6-7yo)... The next week (4-5 days later) mum got a phone call from the hospital saying that she needs to bring him in they reviewed his X-ray and it was broken... Poor kid had been walking in it since the break. 6weeks in cast later!