Radiographs of the left elbow demonstrate a fracture along the dorsal aspect of the ulna (white arrow). There is dislocation of the radial head posteriorly from the capitellum (The red arrow tips should point at each other). There is an elbow joint effusion with an anterior humeral fat pad sail sign (blue arrow). Normal medial / "Internal" humeral epicondyle and olecranon ossification centers are present and should not be confused as fractures (yellow circles)