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Fractures of the lateral plateau are much more common than the medial plateau. To injure the medial plateau, a large amount of force is required; fractures of the medial plateau are usually seen in conjunction with fractures of the lateral plateau and other bones around the knee joint.
This system divides tibial plateau fractures into six types: Schatzker I: wedge-shaped pure cleavage fracture of the lateral tibial plateau, originally defined as having less than 4 mm of depression or displacement
Radiopaedia.org, the peer-reviewed collaborative radiology resource
Segond fracture is an avulsion fracture of the knee that involves the lateral aspect of the tibial plateau and is very frequently (~75% of cases) associated with disruption of the anterior cruciate ligament (ACL). On the frontal knee radiograph, it may be referred to as the lateral capsular sign.
The tibial plateau slopes posteroinferiorly 10-15 degrees; thus, anterior tibial plateau fractures may be occult on AP projections ref. MRI. The medial tibial plateau has been described to have a slightly more concave "golf tee" appearance on saggital projections, when compared to the lateral ref.
Subchondral insufficiency fracture of the knee (SIF/SIFK) are stress fractures in the femoral condyles or tibial plateau that occur in the absence of acute trauma, typically affecting older adults.
Extensive bony injury which is more apparent on CT than plain radiography, although the important "don't miss" sign of lipohemarthrosis should raise your suspicion of a significant fracture.
It can be identified as a bone discontinuity at the posterior tibial articular surface (lateral radiograph view). On MRI or CT imaging, a fractured bone fragment can be noted attached to a retracted/redundant PCL ligament.
Lipohemarthrosis results from an intra-articular fracture with escape of fat and blood from the bone marrow into the joint, and is most frequently seen in the knee, associated with a tibial plateau fracture or distal femoral fracture; rarely a patellar fracture.
The above features are typical of a lateral tibial plateau fracture with spilled depression - Schatzker II.