An anatomical drawing shows the ligaments on the outside surface of the knee. The anterolateral ligament connects the thigh bone to the shinbone. Courtesy of University Hospitals Leuven hide caption toggle caption Courtesy of University Hospitals Leuven Shots - Health News Surgeons Discover Quirky Knee Ligament All Over Again November 7, 2013 Doctors have long overlooked a tiny band that connects two bones in the knee. Now Belgian surgeons say that's a mistake. The obscure structure is a full-fledged ligament. When it malfunctions, people recovering from anterior cruciate ligament injuries may run into trouble.