The lateral meniscotibial ligament (lateral coronary ligament) is the short fibrous band connecting the periphery of the lateral meniscus to the lateral tibial plateau at its rim. It is looser and less robust than the medial meniscotibial ligament and is interrupted posteriorly at the popliteal hiatus, where the popliteus tendon passes. As a result the lateral meniscus can translate about 10-11 mm anteroposteriorly, roughly twice the excursion of the medial meniscus.
| Origin | Inferior peripheral margin of the lateral meniscus |
|---|---|
| Insertion | Rim of the lateral tibial plateau just below the articular margin |
Anchors the lateral meniscus periphery to the tibial rim, limits excessive lateral meniscal excursion during knee motion, and contributes to the lateral compartment stability by transmitting tensile forces from the meniscus to the tibia.
The lateral meniscotibial ligament is disrupted in lateral meniscal tears that extend to the periphery and in posterolateral corner injuries. Its deficiency contributes to abnormal lateral meniscal mobility and the generation of clicking and locking symptoms, and the loose attachment lets smaller tears displace into a bucket-handle configuration. Repair of the lateral meniscotibial ligament during lateral meniscal surgery restores meniscal stability. The popliteal hiatus is a normal gap in the lateral meniscal attachment that must be distinguished from a true peripheral tear at arthroscopy.
Tears at the lateral meniscotibial ligament junction produce a peripheral vertical tear associated with lateral compartment pain and hypermobility of the lateral meniscus, repaired arthroscopically using inside-out, outside-in, or all-inside suture techniques.
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