<prompt> Excision of the head of the radius in a child should not be done because :It produces instability of elbow jointIt leads to secondary osteoarthritis of elbowIt causes subluxation of inferior radio-ulnar jointIt causes myositis ossificans  <response>: Complications of radial head excision in children :Proximal migration of radius with inferior radio - ulnar distal radio - ulnar joint instability.Postero-lateral instability.Cubitus valgus deformity. 