<prompt> A child presented with a fall on an outstretched hand with the elbow in full extension. On examination there is pain and swelling over his right elbow. The probable diagnosis is:Fracture olecranonPost dislocation of elbowSupracondylar fracture of humerusFracture both bones forearm  <response>: Supracondylar fractures are the most common fracture about the elbow in children. They can be either extension type 95, which are displaced posteriorly, or flexion type Extension type injuries most often occur with a fall on an outstretched hand with the elbow in full extension. The patient will have significant edema and tenderness at the elbow, a prominent olecranon, and a depression proximal to the elbow. The appearance may be easily mistaken for a posterior elbow dislocation. Ref: Bredenkamp J.H., Jokhy B.P., Uehara D.T. 2011. Chapter 267. Injuries to the Elbow and Forearm. In J.E. Tintinalli, J.S. Stapczynski, D.M. Cline, O.J. Ma, R.K. Cydulka, G.D. Meckler Eds, Tintinallis Emergency Medicine: A Comprehensive Study Guide, 7e. 