MSK MRI

https://youtu.be/wGrw05qFUh0 There are two different subtypes of type 3 lesions in order to account for the meniscotibial ligament instability. Type 3A represents a vertical peripheral tear of the inferior margin of the posterior horn containing the attachment of the meniscotibial ligament. The other subtype (type 3B) is a tear of the meniscotibial ligament itself from its attachment to the post..

Type 3 lesions, also known as “hidden lesions,” occur in the most inferior portion of the posterior horn and are associated with meniscotibial ligament instability. They are not visible with the transnotch approach, but they may be suspected in case of mobility at probing. There are two different subtypes of type 3 lesions in order to account for the meniscotibial ligament instability. Type 3A r..

Ramp lesion type 2 is a peripheral partial thickness tear involving the superior margin of the posterior horn, where the torn fragment contains the intact meniscocapsular attachment to the posterior horn. Linear vertical fluid signal reaching the superior articular surface of the posterior horn of the medial meniscus red-red zone. (Partial thickness superior vertical tear through the posterior h..

Type 1 Ramp lesion is an isolated posterior superior meniscocapsular tear. Meniscocapsular tears are located peripherally and involve the synovium, leading to posterior meniscocapsular separation from the posterior horn of the medial meniscus. The meniscotibial ligament and the posterior horn itself remain intact. This tear pattern is commonly located in the posteromedial “blind spot” and is par..

The posterior meniscotibial ligament attachment to the PHMM had a mean length of 14.0 ± 5.4 mm at its insertion on the posterior tibia. The posterior meniscocapsular attachment to the PHMM had a mean length of 20.2 ± 6.0 mm. The dMCL had a broad, firm attachment to the midbody of the medial meniscus. The dMCL meniscofemoral attachment blended with the POL meniscofemoral attachment posteriorly an..

The meniscotibial ligament attachment merged with the posterior meniscocapsular attachment to form a common attachment at the meniscocapsular junction. The posterior meniscotibial ligament attachment to the PHMM had a mean length of 14.0 ± 5.4 mm at its insertion on the posterior tibia. The meniscotibial tibial ligament attachment was located 5.9 ± 1.3 mm inferior to the articular cartilage marg..

anatomy of posteromedial capsular‐meniscal unit The meniscocapsular junction of posterior horn of medial meniscus is composed of the meniscocapsular ligament superiorly (also known as meniscosynovial or synovial membrane ligaments) and the meniscotibial ligament inferiorly, both of which attach peripherally into the posterior horn of the medial meniscus. The meniscocapsular and meniscotibial lig..

Medial meniscus is firmly attached to the tibia and femur, acting as a knee stabilizer, and preventing anterior translation, especially in the ACL-deficiency. Ramp lesions, whose name reflects the ramp-like appearance of the posteromedial zone, are a particular type of injury within the posterior horn of the medial meniscus and its meniscocapsular attachments. To date, there is no consensus rega..

The sagittal images progress from lateral to medial and demonstrate the ligament of Wrisberg, passing posterior to the PCL and continuing into the superior margin of the peripheral meniscal tear segment created by the longitudinal tear of the posterior horn of the lateral meniscus. The torn ACL is seen on the sagittal views Note the contusion bone marrow edema at the posterior lateral tibial pla..

The meniscofemoral ligaments may mimic a peripheral vertical longitudinal tear Due to variability in the ligament attachment site, this cleft can extend variably far, and as a result the discrimination between a true tear and a 'pseudo-tear' may pose a challenge. Wrisberg rips, also known as zip tears or zipper tears, are longitudinal vertical meniscal tears. when the average attachment site lie..