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  Medical Imaging  ←  MRI of the Knee  ←
Presentation


Phoenix Diagnostic Clinic

The Posterolateral Corner of the Knee  ←
Popliteal tendon, poplitealmeniscal and poplitealfibular ligament

Popliteal tendon (PT): originates from lateral condyle antero-inferiorly to the lateral epicondyle
• Intraarticular, extrasynovial
• Popliteal bursa
• Deep to FFL and AL

MR appearance:
• 100% visualized
• On all sequences: intense hypointense
• Magic angle artifacts on axial images
• Posterior bursa: differential with capsule tear

Popliteal tendon
Popliteal tendon
Fat posterior to tendon 
Popliteal tendonPopliteal tendon

The poplitealmeniscal fascicles
Connect posterior horn of lateral meniscus with popliteus tendon
• Posteriosuperior and anteroinferior fascicles (stronger)
• Always present but not always seen on MR imaging (60-94%)
• Best seen on oblique coronal
images
Click to enlarge!Click to enlarge!
Click to enlarge!


The poplitealfibular ligament



• From PT to the medial fibular styloid
• Length: 10-14 mm
• Diameter: 7-9 mm
• Visible in cadavers: 90-100%
• Visible on MR: 8-53%
Click to enlarge!Click to enlarge!
Click to enlarge! 
 Biomechanics
 PT, PFL and PMF funtional unit
 • Prevent posterior translation, varus angulation and external rotation
 • Dynamic stabilizer
 • Stabilizer of lateral meniscus
 • Injured PMF lead to meniscus hypermobility and injuries

October 18, 2009

Phoenix Diagnostic Clinic, Bucharest
 

Notice:
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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