Abstract
Background Meniscus injury can significantly impair an individual's quality of life. Meniscus root disruption can more quickly lead to joint degradation than other types of meniscus injuries can. Existing clinical diagnostic testing specific to a meniscus root tear is insufficient. Case Presentation A 51-year-old man unknowingly tore a meniscus root repair, had negative diagnostic testing performed by his primary physical therapist, and subsequently underwent isometric quadriceps and functional testing 2 weeks after his reinjury. Differential diagnosis included bone, muscle, ligament, and general joint irritation from the injury. Outcome and Follow-Up Isometric quadriceps strength (measured as torque production) at 90° was significantly lower (8 times) than at 60° of knee flexion in the presence of a meniscus root tear. Discussion Diagnostic tests for the meniscus may not always be reliable when it comes to diagnosing a root tear. Strength testing at specific angles of knee flexion may be used as a potential clinical indicator that a root tear is present. JOSPT Cases 2021;1(4):268–272. doi:10.2519/josptcases.2021.10493
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