Editorial Commentary: Looking Outside the Box With Ultrasound in an Anterior Cruciate Ligament-Deficient Knee: Welcome to Surgery 2.0.

Perspectives on the anterolateral ligament have changed greatly since the first articles were published that cast doubt on the existence of this structure. The current debate is centered on how to best analyze it. Surgeons are increasingly focusing on the knee's secondary restraints. It is important to understand that magnetic resonance imaging is not the only imaging modality available to us.