Excision of the head of the radius in a child should not be done because :: (A) It produces instability of elbow joint, (B) It leads to secondary osteoarthritis of elbow, (C) It causes subluxation of inferior radio-ulnar joint, (D) It causes myositis ossificans
Answer is C. 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.