Osteochondritis Dissecans of the Capitellum
摘要
Osteochondritis dissecans of the capitellum (OCD) tends to affect young adolescent athletes engaged in repetitive throwing or weight-bearing activities across the elbow. A combination of several biomechanical factors in association with vascular and genetic factors is associated with the pathogenesis of this condition. Clinical features include poorly localised elbow pain that is worse with activity. As the condition progresses, mechanical symptoms including clicking and locking manifest. Radiographs have poor sensitivity; hence, magnetic resonance imaging (MRI) and computed tomography (CT) scan are very useful in establishing the diagnosis and severity of the disease. Several classification systems exist for OCD of the capitellum with the unified grading system (UGS) being most comprehensive as it combines the features of all other systems. The key to managing OCD is to determine if a lesion is stable or unstable. Stable lesions can be managed with non-operative treatment which includes rest and avoidance of repetitive stress across the elbow. Unstable lesions generally need operative intervention with options ranging from arthroscopic debridement, retrograde drilling, osteochondral autograft transplantation (OATS) and minced cartilage grafting. High index of suspicion along with early institution of treatment leads to successful outcomes in OCD of the capitellum.