Fabellofibular ligament

The fabellofibular ligament originates from the fabella, a sesamoid bone (or sometimes a cartilaginous nodule) embedded within the lateral head of the gastrocnemius muscle, and extends distally to insert onto the styloid process of the fibular head.

The ligament courses obliquely, deep to the lateral gastrocnemius. It is a distinct anatomical structure of the posterolateral corner of the knee and is considered a static stabilizer of the posterolateral knee.