Chronic stress injuries of the elbow in young gymnasts

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Abstract
The radiological changes of chronic stress injuries of the elbow in 19 adolescent elite gymnasts are reported. The principal abnormalities were avascular necrosis of the capitellar epiphysis (Panner's disease) (one patient), post-traumatic subarticular necrosis (osteochondritis dissecans) of the capitellum (six patients) and the medial articular eminence of the distal humerus (one patient). Flattening and anterior depression of the radial head epiphysis with an underlying metaphyseal notch associated with an epiphyseal cleft (three patients), which, in one patient who continued training, developed into a chronic Salter Type IV stress fracture. A further patient, post-epiphyseal fusion, showed osteochondritis dissecans of the anterior aspect of the radial head. Seven patients exhibited a spectrum of olecranon changes from fragmentation of the epiphysis to chronic Salter Type I stress fractures of the growth plate. A follow-up survey found that, of those who responded to a questionnaire, nearly all the patients with articular surface damage failed to continue with competitive gymnastics whereas those with olecranon abnormalities were able to continue gymnastics at the same level. The mechanism of injury and the pathological changes are discussed.

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