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Anterior cruciate ligament (ACL) injuries are frequently associated with concomitant injuries to other knee structures, which can significantly impact treatment outcomes. The prevalence of concomitant medial collateral ligament (MCL) complex injuries in patients with ACL tears is notably high, with a recent 2024 multicenter study reporting a rate of 41.3% [1] and another recent study reporting a rate as high as 67% [2]. The MCL complex, which includes the superficial MCL (sMCL), deep MCL (dMCL), and posterior oblique ligament (POL), plays a crucial role in controlling knee laxity. Injuries to these structures can lead to valgus, anteromedial, and posteromedial rotatory laxity. The posterolateral corner (PLC) of the knee is another complex structure that includes the lateral collateral ligament (LCL), popliteofibular ligament (PFL), and the popliteus tendon (PLT). The PLC is essential for controlling varus and posterolateral rotatory laxity. PLC injury patterns and prevalence in patients with ACL tears vary widely [3–7]. A magnetic resonance imaging (MRI) study reported that 19.7% of patients with an ACL injury also had a concomitant injury to at least one PLC structure [7].

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Anterior Cruciate Ligament Injury in Association with Medial or Lateral Damage

  • 章节

  • 发表日期：

    2026年

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  • Riccardo Cristiani,
  • Ting Cong,
  • Anja Wackerle,
  • Efstathios Konstantinou,
  • Yunseo Linda Park,
  • Amalie Nash,
  • Volker Musahl

摘要

Anterior cruciate ligament (ACL) injuries are frequently associated with concomitant injuries to other knee structures, which can significantly impact treatment outcomes. The prevalence of concomitant medial collateral ligament (MCL) complex injuries in patients with ACL tears is notably high, with a recent 2024 multicenter study reporting a rate of 41.3% [1] and another recent study reporting a rate as high as 67% [2]. The MCL complex, which includes the superficial MCL (sMCL), deep MCL (dMCL), and posterior oblique ligament (POL), plays a crucial role in controlling knee laxity. Injuries to these structures can lead to valgus, anteromedial, and posteromedial rotatory laxity. The posterolateral corner (PLC) of the knee is another complex structure that includes the lateral collateral ligament (LCL), popliteofibular ligament (PFL), and the popliteus tendon (PLT). The PLC is essential for controlling varus and posterolateral rotatory laxity. PLC injury patterns and prevalence in patients with ACL tears vary widely [3–7]. A magnetic resonance imaging (MRI) study reported that 19.7% of patients with an ACL injury also had a concomitant injury to at least one PLC structure [7].