Presentation
Alleged motor vehicle accident and sustained left knee dislocation. Anterior drawer test is positive.
Patient Data
Small cortical avulsion fracture at the lateral tibial plataeu.
Avulsion fracture at the lateral tibial plateau. There is complete tear of the anterior cruciate ligament (ACL).
Both medial and lateral menisci are intact. No intrasubstance abnormal high signal intensity seen to suggest meniscal tear or mucoid degeneration.
Case Discussion
Segond fractures are avulsions of the lateral aspect of the tibial plateau. This fracture is frequently associated with anterior cruciate ligament (ACL) tear (75-100%) and meniscal tear (67%).
Mechanism of injury resulting in this type of fracture is external rotation with varus stress causing excessive tension on the lateral capsule ligament.
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