LCL is an abbreviation of 'lateral collateral ligament'.
![medial and lateral collateral ligaments](/sites/default/files/users/user1/collateral.png)
The lateral collateral ligament is also often called the fibular collateral ligament because of its attachment to the fibula.
LCL - a structure of the posterolateral corner
The side of the knee towards the back is anatomically complex, and is referred to as the posterolateral corner, of which the LCL is a part.
Synonyms:
Fibular collateral ligament
Lateral collateral ligament
FCL
-