my son 16 broke his distal humerus but it was displace 1 cm inward. They at a childrens hospital the ortho placed him in a hanging cast to hopefully move the bone back into alignment, 1 week later it was more displaced, they placed more weight on the cast around his forearm, this 1 week later made it more displace. (i feel they placed the weight in the wrong place to more the bone outward)anyway they said "they tried" now it was time for surgery. 14 days after the initial break he had 3 pins put in and they manipulated the bone back into correct alighnment before pinning. It is now perfectly in position and 10 days after surgery he was 50% healed and will get his 3 pins out in 2 weeks. He has been taking symphytum (comfrey) pellets to help heal the bone as well as arnica and bone supplements. If her bone is in complete alignment then normally they don't cast. If its not i would seek new medical attention to make sure it heals right. hope this helped.