Presentation
Trauma to the knee.
From the case:
Arcuate complex avulsion fracture
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Avulsion fracture of the styloid process of the fibula.
Case Discussion
Avulsion fracture of the styloid process of the fibula is in keeping with an arcuate sign and sometimes obscured on routine frontal knee radiographs. It represents an avulsion fracture at the site of the insertion of the arcuate ligament complex.