Knee - lateral capsular anatomy

The lateral capsule of the knee is a bit complex with anterior and posterior structures. Anteriorly we have the ilio-tibial tract, but posteriorly there are a bunch of structures including the lateral collateral ligament, biceps femoris tendon, the arcuate ligament, etc. that contribute to the capsule.

There is an excellent review article by Recondo J et al in a special issue of Radiographics published some years ago, in 2000, that deals with this anatomy in detail.