Lateral Knee Pain? Don’t Ignore Iliotibial Band Syndrome!

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MSK MRI Jee Eun Lee

📌 Iliotibial Band Friction Syndrome

Iliotibial band friction syndrome is a common cause of lateral knee pain associated with intense exercise, such as long-distance running, football, and cycling. 

It results from chronic friction between the iliotibial band and the lateral femoral condyle during knee flexion.

 

✅ MRI Findings

• MRI often shows ill-defined high T2 signal intensity or edema within a compartment-like space bounded laterally by the iliotibial tract and medially by the lateral femoral condyle, lateral meniscus, and meniscocapsular ligaments.
• Thickening of the iliotibial band may or may not be present.
• In some cases, a discrete fluid collection develops within the same space deep to the distal iliotibial band, representing adventitial bursal formation.

 

• Edema superficial to the iliotibial band is uncommon in friction syndrome and is typically associated with acute tra
• Thickening of the iliotibial band itself is usually not observed.

References

1. Skeletal Radiology 49:823–836 (2020)
2. MRI Web Clinic – July 2020 Knee Bursae
3. Radiology Clinics of North America 51(2):433-454 (2013)
4. Skeletal Radiology 46(5):605-622 (2017)

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