3 LATERAL KNEE FRACTURE: WHAT THEY ARE AND WHAT THEY MEAN

01: SEGOND FRACTURE

• Avulsion Fracture of the lateral tibial plateau.
 

• Occurs at attachment site of the Antero Lateral Ligament.
 

• Posterior to IT B insertion site.
 

• Associated with ACL tears.

02: ARCUATE FRACTURE

• Fracture of the Fibula Styloid (tip of the fibula).
 

• Site of attachment of Arcuate Complex.
 

• Predictor of Postero-Lateral Instability.
 

• Associated with PCL tears.

03. LATERAL FIBULAR FRACTURE

• Fracture at the lateral margin of the fibula head.
 

• The LCL and Biceps Femoris tendon insert here.

THE TAKE AWAY

Knowing the anatomy of the insertions together with the location of a fracture fragment informs of the structures that may be damaged.

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