There is a strong link between peripheral longitudinal tears of the menisci and anterior cruciate ligament (ACL) tears. Specifically, about 90% of medial meniscus (MM) and 83% of lateral meniscus (LM) peripheral longitudinal tears are associated with ACL tears. Meniscal tears are found in 41-68% of acute isolated ACL injuries, 85-91% of chronic ACL-deficient knees, and up to 79% of pediatric cases. Meniscal repair, especially when combined with ACL reconstruction, has a better prognosis. Acute ACL injuries often involve lateral meniscal tears, whereas medial meniscal tears are more common in chronic ACL injuries.
The “Wrisberg Rip” is a specific type of longitudinal tear in the lateral meniscus. It starts at the junction of the posterior horn of the lateral meniscus and the meniscofemoral ligament, extending to the ligament’s attachment.
The “Type 4 Ramp lesion” of the medial meniscus is a full thickness vertical peripheral tear in the red-red zone of the medial meniscal posterior horn, identifiable by a high T2 fluid intensity signal from the superior to the inferior articular surface.
#Radiology #ACLInjuries #MeniscalTears #MusculoskeletalRadiology #VisualizingMSK
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