Abstract
1. Two cases of fracture-dislocation of the trochlea are described. One case was complicated by complete ulnar nerve palsy.
2. The injury is caused by direct force applied to the point of the elbow, or it may be associated with posterior dislocation of the joint.
3. Open reduction is recommended, the fragment being held in position by soft-tissue sutures alone.
4. Four other cases mentioned in the literature are reviewed.
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