A 59 yo M presents to the ED complaining of chest pain following an MVC where he was a restrained driver. He reports that he crashed into a cement wall and his chest hit the steering wheel upon impact. On exam, there is noted exquisite tenderness to palpation with a deformity over the sternum. A CXR is obtained. What's the diagnosis? (scroll down for answer)

Diagnosis: Depressed sternal fracture