Anterior lateral meniscofemoral ligament associated with ring lateral meniscus and congenital absence of anterior cruciate ligament managed with ligament reconstruction

A 24 year old otherwise healthy male was presented with a chief complaint of giving way in the left knee. MRI reportedcomplete anterior cruciate ligament (ACL) tearing. Arthroscopy showed ACL agenesis, ring-shaped lateral meniscus,and an anomalous thick band extending from the anterior horn of the lateral meniscus to the intercondylar notch of thelateral femoral condyle, which is known as the anterolateral meniscofemoral ligament (MFL). The MFL was attachedto the anatomic site of anteromedial bundle of ACL. ACL reconstruction surgery was performed using central 1/3 bonetendon bone graft.Practitioners should be aware that ACL reconstruction in lateral meniscofemoral ligament with associated ACL agenesisis a treatment option in which the preservation of MFL, as the stabilizer of anterior horn of lateral meniscus, should beconsidered during ACL reconstruction as a good treatment choice.Level of evidence: V