Table 2

Analysis of COX-2a expression by IHC in human breast tissues

n (%)
Invasive cancer (n = 42)
Negative or low24 (57)
Intermediate8 (19)
High10 (24)
DCIS (n = 16)
Negative or low6 (37)
Intermediateb8 (50)
High2 (13)
Normal epithelium (n = 48)
Negative9
Positive39 (81)
  • a COX-2 expression was categorized based on weighted scores (product of staining intensity and percentage of tumor cell positivity).

  • b Includes DCIS alone (n=2).