SUMMARY
Introduction: Combined lesions of anterior cruciate ligament (ACL) and medial collateral ligament (MCL) are frequent in athletes. While surgical treatment of ACL injury is mandatory treatment regime of concomitant grade II MCL lesions remains unclear with tendency to surgical intervention. Standardized surgical technique is lacking. Present study wants to introduce surgical technique for treatment of concomitant grade II MCL lesion and report short term outcome results.Material and Methods: 5 Patients with acute ACL rupture and grade II MCL-lesion were included. All patients received surgical treatment of concomitant MCL lesion by distinct surgical technique and ACL reconstruction. We evaluated valgus instability, anterior instability and range of motion (ROM) according to international knee documentation commitee(IKDC) and Lysholm-Score both preoperative and after 6, 16 weeks and 9 months postoperative.Results: All Patients showed excellent clinical results at final follow-up. Valgus and anterior stability could be restored in all patients. 1 patient (20%) lost 15° in flexion of ROM atfinal follow up. However in all 5 patients (100%) the findings were gradedas normal or nearly normal according to IKDC knee examination form.Lysholm-Score averaged 94,6.Conclusions: Presented surgical technique improved both, valgus and anterior stability, and led to excellent short term results at final follow up. Level of evidence: IV (therapeutic case series)