The triceps is the large muscle group that sits on the back of the upper arm. The triceps muscle complex consists of three subsets that converge in the back of the elbow into a single tendon that attaches the triceps muscle to bone. Tears of the triceps tendon may be complete or partial. A full tear is also referred to as a triceps tendon rupture. Complete tears typically occur when sudden large load is applied to the triceps muscle complex (falls, weightlifting). Some complete ruptures are associated with pre-existing conditions (tendonitis), injuries (partial tears) or drug treatment (oral steroid use, local steroid injections). The triceps tendon is responsible for straightening the arm; when a triceps tendon tear occurs, there is substantial weakness with elbow extension. Triceps tendon ruptures are serious injuries and are rare. Men who participate in sports, and who are ages 30-50 are particularly at risk. Dr. Riley J. Williams, orthopedic elbow specialist, serving Manhattan, New York City and the surrounding New York boroughs, has extensive experience in treating a triceps tendon tear, triceps tendon rupture and other elbow injuries.