Unhappy triad
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Unhappy triad
Musculoskeletal system
Musculoskeletal system
Musculoskeletal system
Musculoskeletal system
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Unhappy triad
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First Aid
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Anterior cruciate ligament (ACL) injury
“unhappy triad,” p. 459
Medial collateral ligament (MCL) injury
in “unhappy triad,” p. 459
“Unhappy triad”(knee injuries) p. 459
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Summary
An unhappy triad, also known as O'Donoghue's triad, is a common injury that occurs in the knee joint. It involves damage to the anterior cruciate ligament (ACL), medial collateral ligament (MCL), and medial meniscus. The injury usually occurs as a result of a sudden forceful twist or impact on the knee joint, such as during a sports activity. The lateral meniscus may also be involved in some cases. This injury is typically treated with surgery and physical therapy.
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