MSK MRI

The PRLM(lateral meniscus posterior root) provides secondary stability to the anterior cruciate ligament during pivot shift loading. The PRLM has unique features, including its course and configuration. An accurate anatomic understanding of the PRLM is clinically important because this region is difficult to fully visualize arthroscopically. PRLM has two attachment sites of intertubercular regio..

The anterior root of lateral meniscus is normally directed obliquely upward on sagittal images and frequently contains increased internal signal intensity. In this location, the increased signal intensity is sometimes referred to as “speckled.” The anterior root of the lateral meniscus differs from the anterior root of the medial meniscus because it often has a prominent fissured appearance simi..

Proximity and contiguous fibers between the anterior root ligament of the lateral meniscus (LM) and the anterior cruciate ligament The anterior root of the lateral meniscus attaches anteriorly, along the lateral tibial tubercle, posterolateral to the medial meniscus anterior root. The tibial insertion of the anterior cruciate ligament is found medial to the anterior root Anterior horn transition..

The posterior root of the medial meniscus was subcategorized into three zones: transition to posterior horn of medial meniscus at the junction between root and posterior horn (a), midsubstance within root ligament proper (b), and entheseal at the tibial attachment point of root ligament The most common location of medial meniscal root ligament tear was junctional, between the ligament and the po..

The posterior root of the medial meniscus(Red) commences just lateral to the apex of the medial tibial plateau. The yellow line demonstrates where the cartilage of the medial tibial plateau ceases which is another marker for the beginning of the meniscal root. The root attaches along the downward slope of the intercondylar fossa medial and anterior to the posterior cruciate ligament. The medial ..

Superior-view drawing shows relations to meniscal roots attachment sites, anterior cruciate ligament, posterior cruciate ligament, transverse ligament, and posterior meniscofemoral Wrisberg's ligament. Anterior root of the medial meniscus: The anterior root of MM inserts along the tibial eminence, anterior to the insertion of the anterior cruciate ligament. Posterior fibers of the anterior horn ..

https://youtu.be/6Q2lTVFrvPs The meniscus is relatively avascular in adults, except for the peripheral 10% to 25% of the meniscus supplied by the perimeniscal capillary plexus. Notice, on sagittal fat-suppressed PD images, this focal high signal intensity of the peripheral portion of the medial meniscus is not torn, but perimeniscal capillary plexus. The meniscus can be divided into red-red, red..

https://youtu.be/ZCOejlDr3xw Axial and coronal fat-suppressed proton density-weighted images demonstrate medial collateral bursitis(blue) with an elongated fluid collection interposed between the superficial tibial collateral ligament (yellow) and the meniscofemoral(orange) and meniscotibial(pink) portions of the deep MCL. On axial images, the distended bursa has a characteristic bi- lobulated a..

https://youtu.be/XLdqNTeHdTc •This figure illustrates the intimate relationship of the static and dynamic structures of the posteromedial corner, including the semimembranosus tendon fascial expansion that attached directly to the posterior horn of the medial meniscus. •TThe medial meniscal posterior meniscocapsular junction is composed of the meniscocapsular ligament superiorly (also known as m..

https://youtu.be/dnaMoYf8dX8 The anatomic relationship of body and posterior horn of medial meniscus and joint capsule •Axial view illustration of the anatomic relationships of the posterior horn of the medial meniscus (PHMM), posterior capsule, posterior oblique ligament (POL), deep medial collateral ligament (MCL), and semimembranosus tendon. •The attachment of the MM to the joint capsule is m..