Arcuate sign – a subtle but important avulsion fracture of the…

Arcuate sign – a subtle but important avulsion fracture of the proximal fibula at the site of arcuate ligament complex insertion. It is associated with cruciate ligament injury in around 90% of cases and represents an unstable posterolateral corner injury. When detected, the arcuate sign should prompt further evaluation with MRI and referral to an orthopaedic surgeon. 

from our tumblr blog

http://radiologysigns.tumblr.com/

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