As impossible as it may seem, two surgeons at University Hospitals Leuven have discovered an entirely new part of the human body. It is a ligament in the knee and it appears to play a role in patients suffering from a tear in their anterior cruciate ligament (ACL), a common sports injury.
Named the anterolateral ligment, it was discovered using macroscopic dissection techniques after the doctors began investigating possible causes for complications after rehabilitation for ACL. They came across a paper written in 1879 that hypothesized the existence of a previously unknown ligament in the knee. The author of the paper turned out to be correct; Dr Claes and Dr Bellemans managed to locate the ligament and claim it can be found in 97% of all patients. Further research found that the pivot shift, a common complication after ACL rehabilitation, is caused by a tear in the ALL ligament.
Missed a whole ligament. Attention to detail much?