Arcuate sign

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[edit] 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.

[edit] Imaging Findings for Arcuate sign

[edit] Images

Patient #1

[edit] See Also

[edit] External Links

[edit] References for Arcuate sign