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The ACL is in the middle of the knee joint and is an intra-articular ligament. This is important to understand because, in general, extra-articular ligaments (MCL) can heal sometimes on their own without surgery, while intra-articular ligaments (ACL) cannot.

Source: HSS

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  • American Academy of Orthopaedic Surgeons
  • American Orthopaedic Society for Sports Medicine
  • The Arthroscopy Association of North America
  • American Shoulder and Elbow Surgeons
  • University of Pittsburgh