Burtonblue said:
With a complete lateral collateral rupture (which they usually are as you well know) most of the time. They are usually missed by junior docs in casualty in my experience and require delayed reconstruction.
So you will know that isolated LCL rupture is unusual and associated with ACL and PCL tear....which is my fear.
To try and pick an isolated LCL clinically is difficult for Orthopaedic Consultants, so to expect a junior doc to do so is expecting a lot. As you know a knee can appear stable immediately after an injury due to swelling rendering the anterior draw test, Lachmanns and pivot shift test useless. We won't know for sure until he has had an MRI and anything prior to this is pure conjecture.