Modified Noyes grading of the chondral injury

Dr Amir Rezaee et al.

Chondromalacia can be divided into 4 grades by MRI, typically using fat saturated proton density sequences. The original Noyes grading system was based on arthroscopic findings. The modified Noyes system was published in 2009.

  • Grade 0: normal cartilage
  • Grade 1: increased T2 signal intensity of morphologically normal cartilage not oriented at 55° to the external magnetic field
  • Grade 2A: superficial partial-thickness cartilage defect <50% of total articular surface thickness
  • Grade 2B: deep partial-thickness cartilage defect >50% of total articular surface thickness
  • Grade 3: full-thickness cartilage defect
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Article information

rID: 38880
Section: Staging
Synonyms or Alternate Spellings:
  • chondral injury classification
  • Noyes

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