MSK MRI

The pseudotear caused by the high signal band located between the MFLs and the posterior horn of the lateral meniscus. Wrisberg rip is the longitudinal tear of the posterior horn of the lateral meniscus. Differentiation of this tear from the normal pseudo-tear is made by lateral extension of the cleft between the meniscus and meniscofemoral ligament by 1.4 cm or more lateral to the lateral margi..

Wrisberg rip, also known as zip tear or zipper tear is the longitudinal tear of the posterior horn of the lateral meniscus. Wrisberg rip occurs at the junction of the meniscofemoral ligament and the posterior horn of the lateral meniscus. Axial oblique reformatted image demonstrates the course of the ligament of Humphrey anterior to the PCL (blue arrows) as it joins to the meniscal fragment peri..

Posterior oblique drawing demonstrates PCL, LM, meniscofemoral ligaments (Humphry ligament and Wrisberg ligament) The meniscofemoral ligaments originate from the posterior horn of the lateral meniscus and insert onto the lateral aspect of the posterior medial femoral condyle, with the Humphry ligament anterior to the posterior cruciate ligament (PCL) and the Wrisberg ligament posteriorly Wrisber..

There is a close association between ACL tears and peripheral longitudinal tears in the posterior horns of both the medial and lateral menisci. Acute ACL injury is associated with more lateral meniscal tears, while chronic ACL deficiency is associated with more medial meniscal tears,many of which require meniscectomy. So early ACL reconstruction is recommended also for the prevention of secondar..

Wrisberg-variant discoid lateral meniscus can be interpreted as peripheral longitudinal tear or popliteomeniscal fascicles tear. Watanabe classification recognizes three distinct variants of discoid meniscus, complete variant, partial variant, and Wrisberg variant. The Wrisberg-variant discoid lateral meniscus is an unstable type that lacks posterior ligament attachments, having only an attachme..

It is sometimes difficult to identify peripheral longitudinal tears in the posterior horn of the lateral meniscus because of the complex anatomy and posterior attachments of the capsule and popliteomeniscal fascicles. Far peripheral longitudinal tears can be more difficult to detect With an “extra” vertical line or layer in the meniscal periphery, it can be a subtle finding that indicates a tear..