X Ray of the week #11

Patient 40 yr Old male presented in emergency hours immediately following trivial fall with the above X ray.
Patient denies any history of previous fall or injury to the same limb in the past.

Whats your Radiological diagnosis??


O/E:
Significant findings are
Thicknening of lower end of humerus and proximal ulna
Non tender

FFD of 30deg with further flexion possible upto 100 deg
Pronation upto 45 deg
Supination upto 40 deg