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Injection-induced contracture of the quadriceps femoris muscle in children.

Contracture of the quadriceps femoris in children leads to limited knee flexion.1 Fairbank and Barret2 and Hnevkovsky3 believed the contracture was congenital or secondary to progressive idiopathic fibrosis of the vastus intermedius. Lloyd-Roberts and Thomas4 stipulated that multiple injections into the thigh might cause the contracture. Proximal release in the early stage and distal release in the late stage are the recommended treatments.5 Concomitant proximal and distal release in the early stage has not been reported previously. This article presents a case of quadriceps contracture due to multiple thigh injections in a young patient.