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Table 1 Immunohistochemical staining reaction for MMP-13 in normal cartilage and chondrocarcomas.

From: Is collagenase-3 (MMP-13) expression in chondrosarcoma of the jaws a true marker for tumor aggressiveness?

Samples No of cases Intensity of staining Percentage of positive cells (%)
   Negative - Mild + Moderate ++ Intense +++  
Normal cartilage 2 2 (100%) - - - -
GI chondrosarcoma 4 3 (75%) 1 (25%) - - 0 %–4.2 %
GII chondrosarcoma 5 - - 2 (40%) 3 (60%) 15.4%–30.8%
GIII chondrosarcoma 2 - - - 2 (100%) 37.6%–40.2%
  1. (-) Negative : 100% of cells negative.
  2. (+) Mild : 0% – < 25% of cells positive.
  3. (++) Moderate : 25% – >50% of cells positive.
  4. (+++) Intense : 75% – 100% of cells positive