Two orthopedic surgeons at the Belgian University Hospitals Leuven have announced that they have found a new knee ligament. Dr. Steven Claes and Dr. Johann Bellemans and their associates have worked diligently to give a full anatomical depiction of the new ligament that they term the anterolateral ligament (ALL).
Due to its origin and insertion points, they propose that the ALL controls rotation of the tibia; therefore, when someone
sustains an ACL (anterior cruciate ligament) tear, they are most likely damaging the ALL as well. In spite of a successful ACL repair and rehabilitation, some patients still experience the so-called “pivot shift” or episodes of the knee “giving out” during activity. Researchers are in the process of concluding that those sensations are due to injuring the ALL.
After researching for the last 4 years as to why some ACL repairs were still getting the “buckling” or “giving out” sensation, these specialists gathered 41 knee joints from human cadavers and began dissecting them. Results concluded that this fibrous band originates on the outside (lateral) aspect of the femur and inserts at the lateral aspect of the tibia, which leads specialists to agree that this ligament must stabilize the outer part of the knee, preventing it from collapsing inward. All but one of the knees dissected had the presence of the ALL. They suspect that the knee with the missing ALL, possibly ruptured and withered at some point.