An anterior cruciate ligament and medial collateral ligament tear in a skeletally immature patient: a new technique to augment primary repair of the medial collateral ligament and an allograft reconstruction of the anterior cruciate ligament.

The goal of this case report is to fill a dual purpose. We describe a case involving a tear of the anterior cruciate ligament (ACL) and medial collateral ligament (MCL) in a skeletally immature athlete. At the same time, we describe a new technique with which we repaired the ACL with an allograft posterior tibialis tendon through intra-articular tunnels. A trial of conservative therapy for the MCL was performed. During surgery, its instability was assessed. No improvement was seen in stability, so a primary repair of the MCL was performed and augmented with an autograft gracilis tendon. The patient did well postoperatively, subsequently achieving equal stability and range of motion when compared with the opposite limb. He was back to competitive sports at 6 months.