Search
Rotational Injury to the Knee
Additional Information
The plain film shows a small, crescent shaped bone fragment adjacent to the lateral tibial plateau.
This fracture is called a Segond fracture
It represents a bony avulsion of the anterolateral ligament (ALL) NOT the ACL
However, this fracture pattern is associated with a tear of the ACL tear 75-100% of the time.
Also associated with meniscal injuries (65-75%)
The ALL runs from the lateral femoral condyle and inserts on the anterolateral proximal tibia near the fibular head
The ALL helps to control tibia internal rotation
Works in concert with the ACL to prevent anterior rotational tibia subluxation
This injury pattern on plain film indicates a significant ligament injury and changes management because ACL reconstruction is often required.