Acute dislocation of the elbow caused by a solitary osteochondroma of the proximal radius.

A young man presented with acute dislocation of the left elbow at the radio-capitellar articulation caused by trapping of the biceps tendon at the stalk of a solitary osteochondroma. There was no deformity of the ulna and radius shaft suggestive of a developmental growth disturbance of the forearm bones. Good reduction could be achieved by simple relocation of the biceps tendon. The osteochondroma was excised.