The lateral collateral ligament (LCL) is like a thin cord that
runs from the bottom of your thigh bone to the top of your fibula
bone on the outside of your knee.
It's a rare lesion and it's not usually damaged on its own but
you need to have it repaired quickly +++ in the weeks following
the injury. Late repair is difficult.
Varus instability allows the diagnosis : With the patient lying
flat, and the knee held at about 30° of flexion, the shin is
shifted to the inside. Insufficiency of the MCL will allow the knee
to "open up " excessively compared to the other knee.
Diagnosis may be difficult and MRI is to be performed if there is
Docteur Jean Etienne Perraudin,