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Table 2 Mankin score for evaluation of articular cartilage degeneration

From: Usefulness of using laser-induced photoacoustic measurement and 3.0 Tesla MRI to assess knee cartilage damage: a comparison study

   Grade
I Structure  
  a. Normal 0
  b. Surface irregularity 1
  c. Pannus and surface irregularity 2
  d. Clefts to transitional zone 3
  e. Clefts to radial zone 4
  f. Clefts to calcified zone 5
  g. Complete disorganization 6
II Cells  
  a. Normal 0
  b. Diffuse hypercellularity 1
  c. Cloning 2
  d. Hypocellularity 3
III Safranin–Orange staining  
  a. Normal 0
  b. Slight reduction 1
  c. Moderate reduction 2
  d. Severe reduction 3
  e. No dye note 4
IV Tidemark integrity  
  a. Intact 0
  b. Crossed by blood vessels 1