Incipient malunion of an isolated humeral trochlea fracture treated with an elbow hemiarthroplasty: case report.

We report the case of a 49-year-old woman with severe elbow ankylosis 10 weeks after a trochlea fracture treated with open reduction and internal fixation. Imaging confirmed failure of open reduction and internal fixation with a displaced and severely damaged trochlea. We treated the nascent malunited trochlea and associated elbow ankylosis with a distal humeral hemiarthroplasty and circumferential elbow arthrolysis. The patient regained functional range of motion of the elbow and had minimal pain. Distal humeral hemiarthroplasty, which has been indicated for acute fractures involving the capitellum or the entire distal humerus, may also be indicated for certain isolated complex fractures of the trochlea.