Meniscal ramp lesions are reported to occur in 9% to 42% of anterior cruciate ligament tears. Biomechanical research shows that the presence of a meniscal ramp lesion, in the setting of an anterior cruciate ligament tear, leads to increased knee anteroposterior and rotatory laxity when compared with an uninjured medial meniscus. This finding also has been verified clinically. Repair of ramp lesions has been shown to improve biomechanics. Accordingly, the influence of meniscal ramp lesions on knee laxity necessitates a comprehensive physical examination, imaging review, and diagnostic arthroscopy to support identification and treatment of these injuries. Arthroscopic probing is required to assess ramp lesion stability. It is generally accepted that up to 30% of ramp lesions are unstable and warrant repair, as determined by tear ≤1 cm, displacement into the medial compartment with probing, and extension beyond the lower pole of the femoral condyle.
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| http://dx.doi.org/10.1016/j.arthro.2024.06.031 | DOI Listing |
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Article Synopsis
- The study investigates how effectively MRI can detect meniscal ramp lesions in the knee when positioned at 120° flexion versus near extension, noting that traditional MRI methods have low sensitivity for these types of injuries.* -
- Researchers analyzed data from 154 patients undergoing ACL reconstruction and found that MRI in the flexed position had significantly higher sensitivity (91.9% vs. 69.4%) and specificity (94.6% vs. 77.2%) in identifying these lesions.* -
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Ramp lesions of the medial meniscus are associated with greater preoperative anterior knee laxity in anterior cruciate ligament injury.
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