Radial head fracture
A clear example of a radial head fracture. The patient underwent a CT of the elbow when he presented to clinic a week later unable to supinate his forearm. However the fracture demonstrated would not likely impair range of motion. He was managed conservatively with physiotherapy and soon regained full range of motion.
Key learning point: In a radial head fracture, always look for an associated fracture of the coronoid process of the ulna which could indicate a 'terrible triad' injury which has been reduced prior to imaging.