The ligament of Wrisberg is the posterior meniscofemoral ligament, larger and more commonly present than the Humphrey ligament (found in 60-70% of knees). It passes posterior to the PCL from the lateral meniscus posterior horn to the medial femoral condyle. It is the primary meniscofemoral ligament when both are present. The discoid lateral meniscus (in children) may lack its posterior horn attachment when the Wrisberg ligament is absent, producing the unstable Wrisberg variant of discoid meniscus.
| Origin | Lateral meniscus posterior horn |
|---|---|
| Insertion | Medial femoral condyle — passes posterior to the PCL |
| Actions | Restrains lateral meniscus posterior horn; assists PCL in resisting posterior tibial translation |
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The Wrisberg variant of discoid lateral meniscus lacks normal posterior horn tibial attachment, with the ligament of Wrisberg as the only posterior restraint. This produces the characteristic snapping in young children (congenital knee click) from posterior horn hypermobility. Saucerisation (partial meniscectomy to normal shape) plus posterior horn repair creates stable peripheral attachment.
Discoid lateral meniscus lacking posterior tibial attachment with only the Wrisberg ligament as posterior support producing childhood knee snapping managed with saucerisation and posterior repair.
