Discussion of Arcuate sign
- The arcuate sign is a finding that is best demonstrated at standard anteroposterior radiography of the knee.
- The sign consists of a linear lucency through the head of the fibula, representing a fracture.
- The arcuate sign indicates an avulsion fracture of the head of the fibula at the insertion site of the arcuate ligament complex and is considered to be a sign indicative of injury to the posterolateral corner of the knee.
- The arcuate sign indicates an injury to the arcuate ligament complex and does not refer to the appearance of the fracture line itself.
- The arcuate ligament complex is not a single structure but a combination of several structures that form an arcuate (arched) appearance.
 Imaging Findings for Arcuate sign
 See Also
 External Links
 References for Arcuate sign
- William M. Strub. The Arcuate Sign. Radiology 2007 244: 620-621.