Injection-induced contractures of the quadriceps during childhood.

A total of 8 cases affected with injection-induced contractures of the quadriceps occurring in 7 patients were followed-up at the Division of Pediatric Orthopaedics at the Rizzoli Orthopaedic Institute. Mean age was 8 years (minimum 5, maximum 9). Surgery involved arthromyolysis according to Judet whether or not associated with distal reconstruction of the quadriceps. Mean follow-up was 9 years (3-17). Mean increase in passive flexion of the knee was 70 degrees, while deficit in active extension was observed in 50% of cases. The clinical aspects indispensable for diagnosis, the therapeutic choices, the surgical method reported in the literature and the results obtained using this method are all discussed.