Posterolateral corner of the knee “the mysterious corner”: a review of anatomy, biomechanics and current treatment paradigms

The posterolateral corner (PLC) of the knee remains one of the most complex and often underdiagnosed stabilizing units of the knee joint. Injuries to the PLC are frequently overlooked, contributing to chronic instability, early onset osteoarthritis and increased likelihood of total knee arthroplasty. Recent anatomical and biomechanical studies have highlighted the critical role of the PLC in maintaining knee stability, particularly in resisting varus stress, external tibial rotation and posterior translation. This review aims to consolidate current knowledge on the anatomy and biomechanics of the PLC, epidemiological trends and evolving management strategies, including anatomical reconstruction techniques and arthroscopic advancements. It emphasizes the necessity for heightened clinical suspicion, accurate diagnosis and appropriate treatment to prevent long-term disability.