The main function of
anterior cruciate ligament (ACL) is to maintain stability of the
knee joint and prevent anterior displacement of the tibial plateau.
ACL injury accounts for more than 50% of the
knee joint injuries. If not timely handled, it
will increase the
risk of
secondary injuries to structures such as the
meniscus and
cartilage, causing
chronic pain and degeneration of the
knee joint. Although most
ACL injuries can be determined by their direct signs on MRI, the identification of complex situations and partial
tears of ACL are still not satisfactory, which subsequently
affects treatment strategies. After
ACL injury, changes in anatomical relationship of the
knee joint can also
lead to morphological changes in other structures such as the
posterior cruciate ligament (PCL) on MRI, and these indirect signs can assist in the
diagnosis of
ACL injury. The authors reviewed the application of MRI-related
indicators of PCL in diagnosing
ACL injury, hoping to provide references and new ideas for
clinical decision-making.