Arthroscopic images show that the AHLM are tears, with loose fibers in injured region and circumferential fiber bundles were separated (A), which can be separated by arthroscopic probe at meniscus surface or inside the injury (B).

<p>Arthroscopic images show that the AHLM are tears, with loose fibers in injured region and circumferential fiber bundles were separated (A), which can be separated by arthroscopic probe at meniscus surface or inside the injury (B).