The radial head is the curcular, disc-like part of the radius that articulates with the end of the humerus called the capitellum. The radial head is a commonly injured bone, but sometimes the fracture cannot be seen initially on xray. In these instances we rely on your history and physical exam, and subtle findings on the xray that suggest a fracture. Sometimes, the best treatment is early range of motion exercises with only a sling for comfort. At other times the fracture may require surgery to put the broken pieces back together, so the smooth movement of elbow flexion and extension, and forearm rotation, can be restored. Dr. Yu will discuss the nature of your particular injury with you, and determine the best course of treatment for your elbow. This may involve serial xrays, splinting, early range of motion, or surgery.