Abstract
The patient was a twelve-years-old body, who was injured by having a fall on rid-ding bicycle. By X-ray examination, forward dislocation of the elbow with fractures of radial and ulnal condyle of the humerus were observed. But fracture of the olecranon was not seen.
Under general anaesthesia this dislocation was redused manually. Ten days after that, fracture of the ulnar condyle wad fixed with a screw. The active motion of the elbow was begun after the plaster cast fixation for three weeks.
Seven months later of trauma, the motion was limited clinically and periarticular calcification was seen radiologically.
In this case, it is thought that the olecranon which was displaced towards ulnar side at first broked the ulnar condyle and dislocated forward with it.
