MRI grading system for meniscal signal intensity

MRI grading system for abnormal high meniscal signal intensity was reported by Lotysch et al. MR grades 1, 2 and 3 have been used:

  • grade 1: small focal area of hyperintensity, no extension to the articular surface
  • grade 2: linear areas of hyperintensity, no extension to the articular surface
    • 2a: linear abnormal hyperintensity with no extension to the articular surface
    • 2b: abnormal hyperintensity reaches the articular surface on a single image
    • 2c: globular wedge-shaped abnormal hyperintensity  with no extension to the articular surface

Some Grade 2 abnormal meniscal signals ware found to be associated with a meniscal tear on arthroscopy. Therefore, they were subdivided into 2a, 2b, and 2c. Dillon et al. said that 50% of patients with grade 2c had meniscal tears on arthroscopy.

  • grade 3: abnormal hyperintensity extends to at least one articular surface (superior or inferior), and is referred as a definite meniscal tear
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Article information

rID: 36617
Synonyms or Alternate Spellings:
  • MR grading system for meniscal signal intensity
  • Grading system for meniscal signal intensity: MRI
  • Meniscal signal intensity: MRI grading system

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