If you just found out that the pain and swelling in your knee is a torn meniscus, you probably have a decision to make about how to treat it. There have been multiple studies that have demonstrated the clinical success of meniscal repair. Both clinically positive meniscal tear and mri positive tear were present in 37. Knowing the distribution of meniscal tears is helpful in assessing the menisci on mri. Meniscal tear patterns in acl disruption radsource. Most often these tears are longitudinal partial thickness tears along the posterior horn of the lateral meniscus associated with an acl tear. Pdf mri of meniscal buckethandle tears gary hinson. An mri will be able to take pictures of cartilage and ligaments to determine if theres a meniscus tear. Mr imagingbased diagnosis and classification of meniscal. Clinical meniscal tear was positive in 41 82% patient while mri meniscal tear positive was present in 44 88%. Meniscal tears can be assessed arthroscopically for stability and vascularity. The success of meniscus repair depends on tear pattern recognition and location for the capacity to heal. No contrast reference sheet headneck body part reason for exam procedure to precert cpt. Because of this tear distribution, i am cautious in diagnosing a medial meniscal tear that does not involve the posterior horn.
Full thickness peripheral tears less than 5mm and radial tears less than 5mm may also be conservatively managed. Ligament tear meniscal tear muscletendon tear mri joint without contrast upper extremity lower extremity 73221. Racgp meniscal tear presentation, diagnosis and management. While most horizontal or cleavage tears are chronic and. While mri has a high reported sensitivity of 90% for detecting medial meniscal tears, to date, mri has not proven as successful in diagnosing meniscocapsular separations with reported sensitivity of 4871%. In this series of how to read a mri of a meniscal root tear, this patient was very active and felt a pop in the back of the knee when squating down and a few weeks later was unable to bare weight. In an arthroscopic series of 1086 medial meniscal tears, the posterior horn was involved in 98% of the torn medial menisci. There are three basic mr characteristicscriteria of meniscal tears 5. The tear is a horizontal cleavage tear yellow arrows involving the anterior horn of the lateral meniscus.
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