(Fig 5-A.07) Partial Thickness Cartilage Damage

https://youtu.be/t6UpzUIm8PM

https://youtu.be/YyQWPfrVkxI

 

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📌 Partial Thickness Cartilage Damage

 

• Modern surgical and MRI grading systems classify cartilage damage into four categories, ranging from cartilage softening to full-thickness damage.

✅ Grading Categories

1. Category 1: Cartilage Softening
2. Category 2: Damage < 50% Thickness
3. Category 3: Damage > 50% Thickness
4. Category 4: Full-Thickness Damage

 

✅ MRI Classification by ICRS

• The International Cartilage Repair Society (ICRS) classification system is widely accepted for MR imaging of articular cartilage lesions.

★ ICRS Grades

• Grade 2
  • Lesions < 50% cartilage thickness
• Grade 3
  • Lesions > 50% but not through the subchondral bone
  • Includes chondral blisters, delamination, and chondral flaps

 

★ Grade 3 Subcategories

• Grade 3A
  • Defect > 50% but not down to the calcified layer
• Grade 3B
  • Defect > 50% down to the calcified layer
• Grade 3C
  • Defect down to but not through the subchondral bone plate
• Grade 3D
  • Defect > 50% with blisters

 

★ Imaging Limitations

Due to spatial resolution limitations, current MR imaging may not reliably distinguish between Grade 3a, 3b, and 3c.

 

References

1. RadioGraphics 2022; 42:1457–1473
2. J Clin Orthop Trauma. 2021 Sep 25;22:101610
3. Knee Surg Sports Traumatol Arthrosc. 2016;24: 2046e2054
4. Magn Reson Imaging Clin N Am 19 (2011) 379–405

#CartilageDamage, #ICRS, #MRI, #ChondralLesions, #Orthopedics, #Radiology, #SportsMedicine, #MedicalImaging, #Arthroscopy, #Musculoskeletal