Introduction
ACL, ALL
ACL-R is a commonly performed orthopedic procedure that aims to restore the stability of the knee in patients who have sustained an ACL injury. However, residual rotational instability after ACL-R has been reported [There are several standardized extra-articular stabilizing surgical procedures on the anterolateral side of the knee, including lateral extra-articular tenodesis (LET). These were once the primary procedures for the treatment of ACL deficiency [The anterolateral ligament (ALL) was recently rediscovered and described in anatomical, biomechanical, and radiological studies [The outcome after ACL revision surgery is inferior to the outcome after primary ACL reconstruction in terms of subjective outcome, clinical knee stability, and the risk of further revision surgery [The role of an anterolateral extra-articular procedure in ACL revision surgery has been previously investigated [The aim of this study was to evaluate the outcome after ACL revision with or without additional ALL reconstruction in a randomized controlled trial. The hypothesis was that combined ACL revision and ALL reconstruction would result in a superior outcome compared to isolated ACL revision.