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📌 Pre-Patellar Friction Syndrome
✅ Anatomy:
- Superficial Layer: Transverse orientation to the patella.
- Intermediate Layer: Oblique orientation, arising from the expansion of the vastus medialis and lateralis with some contribution from the superficial fibers of rectus femoris.
- Deep Layer: The Prepatellar Quadriceps Continuation, Longitudinal orientation, formed by the deep fibers of rectus femoris, adherent to the underlying bone, and continuing inferiorly to become part of the patellar tendon.
✅ Clinical Features:
- Anterior knee pain during physical exertion.
- Point tenderness over the superior pole of the patella, mostly at the medial aspect.
- Caused by repetitive motion leading to the superficial and intermediate layers of the pre-patellar soft tissues rubbing against the fixed deep layer.
✅ Diagnosis:
- Ultrasound: Demonstrates fascial defects.
- MRI: Expected to show oedematous swelling of the pre-patellar soft tissues.
Defects in the thinnest superficial layer observed during surgery, with possible defects in the intermediate layer.
Inflammation in the deepest layer without tears. - ★ Important to differentiate from pre-patellar bursitis on MRI.
Skeletal Radiology (2020) 49:823–836
"Visualizing MSK Radiology: A Practical Guide to Radiology Mastery"
© 2022 MSK MRI Jee Eun Lee All Rights Reserved.
No unauthorized reproduction, redistribution, or use for AI training.
#PrePatellarFrictionSyndrome, #KneePain, #CyclingInjury, #AnteriorKneePain, #MRI, #Ultrasound, #OrthopedicSurgery, #SportsInjury, #KneeAnatomy, #MedicalResearch
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