What is the definition or description of: radial head fracture?

Radial head: The radial head is a concave end on the top part of the radius bone of the forearm that articulates with the elbow. It can be fractured with a fall on an outstetched hand as has been assocated with dislocations.

Radial head: Radial head is the proximal aspect of the radius a bone in your forearm that ends in articulation with the elbow at the capitellum on the lateral side of the distal humerus the radius spins at the radiocapitellar joint as you rotate your forearm. Minor fractures there can result from a simple fall to the hand or severe complex fractures associated with dislocation or ligament injury.