Osteochondral flap fracture of the olecranon with dislocation of the elbow in a child: a case report.

An osteochondral intraarticular fracture of the ulnotrochlear joint in a child is rare. The author reports on a 12-year-old child with an osteochondral intraarticular flap fracture of the proximal ulna associated with a dislocation of the elbow joint. Three-dimensional reconstruction computerized tomogram imaging revealed the direction of displacement and the origin of the detached flap. This fracture has been previously described by Rang (1974), but no illustration was provided. To date, only one other case in a child was reported by Blasier (1989), but it did not confirm an exact correlation between the osteochondral intraarticular fracture with dislocation of the elbow, which would have suggested the mechanism of injury.