| A sesamoid bone is occasionally contained within the tendon of the triceps muscle proximal to the olecranon. |
| It arises from the posterior surface of the medial epicondyle of the humerus and is inserted onto the olecranon process. |
| All three heads run into a common tendon that crosses the elbow joint and inserts on the olecranon process on the ulna bone in the Forearm. |
| Other locations include the ulnar aspects of the forearm, olecranon, and prepatellar bursae, Achilles tendons, and hands. |
| Patients with long-standing gout may have tophi over the olecranon prominence, first metatarsal joints, or pinnae. |
| The olecranon bursa may also be the site of infection, frequently caused by Staphylococcus aureus. |
