(Fig 4-A.29) Partial MPFL Tear at Multiple Sites

https://youtu.be/tOk0dMOGt18?si=lbapoRVI2jXagNPk

https://youtu.be/vzxclU_34OI?si=B88NykUJHSELzyAC

 

==============================================

🎥 Check Out All Videos at Once! 📺

👉 Visit Visualizing MSK Blog to explore a wide range of videos! 🩻

https://visualizingmsk.blogspot.com/?view=magazine

📚 You can also find them on MSK MRI Blog and Naver Blog! 📖

https://mskmri.tistory.com/

https://blog.naver.com/mskmri

https://www.instagram.com/msk_mri/

Click now to stay updated with the latest content! 🔍✨

==============================================

📌 MPFL Injury in Lateral Patellar Dislocation

 

✅ Prevalence and Location

• The MPFL is injured in almost all (∼95%) patellar dislocations
• The location of the injury varies: 37% at the patellar attachment, 37% at the femoral attachment, 16% midsubstance, and the remainder at a combination of sites

 

✅ MRI Findings

• Thickening, intraligamentous fluid, waviness of the fibers, and frank discontinuity indicate MPFL injury

 

✅ Case Study: Evaluating MPFL Components

1️⃣ Medial Quadriceps Tendon Femoral Ligament Component

• Identified within the purple dotted lines on the proximal axial image
• This patient shows a partial tear compared to normal

 

2️⃣ Transverse Component

• Highlighted in yellow on the axial image
• Femoral and patellar side partial tear of the transverse component observed

 

3️⃣ Oblique Decussation Component

• Highlighted in pink, attaches to the proximal superficial MCL fibers
• Femoral and mid-substance partial tear of the oblique decussation component observed

 

---

 

📌 Lateral Patellar Dislocation

✅ MPFL Injury:

• MPFL is injured in ~95% of patellar dislocations
• Injury location varies: 37% patellar attachment, 37% femoral attachment, 16% midsubstance
• MRI findings: thickening, fluid, waviness, discontinuity

✅ Injury Pattern:

• Femoral attachment is weakest part of MPFL
• Patellar insertion reinforced by surrounding structures
• In skeletally immature, patellar-based MPFL/chondral injury more common

 

➡️ References:

Radiographics. 2023 Jun;43(6):e220177

RadioGraphics 2018; 38:2069–2101

Knee Surg Sports Traumatol Arthrosc. 2019 Jan;27(1):197-205

Knee Surg Sports Traumatol Arthrosc. 2018 Mar;26(3):677-684

 

"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.

#LateralPatellarDislocation, #MPFL, #MRIFindings, #QuadricepsTendonFemoralLigament, #TransverseComponent, #ObliqueDecussationComponent, #PartialTear, #MCL, #PatelloFemoralLigament, #KneeInjury