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  Medical Imaging  ←  MRI of the Knee  ←

Phoenix Diagnostic Clinic

The Posterolateral Corner of the Knee  ←  PLC Associated lesions

Associated lesions

Isolated PLC lesions are rare
• Associated cruciate ligament injuries are common

Lesion resulting from PLC injuriesLesions suggesting PLC injuries
ACLThe “arcuate sign”
MCLAnteromedial tibial plateau fracture
MMThe Segond fracture
Anteromedial tibial plateau fracture 
N Bolog, J Hodler. Skeletal Radiology 2007;36:715

Associated lesions

1/3 of cases associated with PCL tears and bone fractures

35-year-old car accident
• Hematoma of musculotendinous junction PM
• Complete tear of PCL

Associated lesions

• Isolated PLC lesions are rare
• Associated cruciate ligament injuries are common

28-year-old severe knee trauma
• Complete disruption of LCL
• Tear of PT at insertion
• Complete tear of both cruciate ligaments

Associated lesions

• Tear of PT   • Tear of MCL   • Tear of ACL

28-year-old patient 
  Associated lesions suggesting PLC
  The “arcuate sign”
  • Avulsion of fragment of the head of fibula
  • Insertion of AL, PFL and FFL
  • 89% cruciate ligament tears, 33% PT and PM injuries
The “arcuate sign”The “arcuate sign”

Associated lesions

• Bone avulsion fibular head
• Haematoma

40-years-old patient with posterolateral instability

October 18, 2009

Phoenix Diagnostic Clinic, Bucharest

This site is primarily intended for use by qualified medical or sport professionals.
If you are a consumer, you should evaluate the information together with your physician or other qualified healthcare professional.
The information provided here is for educational and informational purposes only and should not be considered as a medical advice.
As medical and sport science is permanently changing, we (authors and publishers) use our best efforts to provide accurate information, but we can not warrant that the information in this article and web site is accurate, complete or up-to-date.
This article reflects the opinions and judgments of it's author and may be further updated.
If you have questions regarding this article, please contact the author.
Information belongs to Phoenix Diagnostic Clinic, Bucharest

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