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Table 2 Comparison of ER and PR in paired core biopsies (n = 23 women)

From: A prospective comparison of ER, PR, Ki67 and gene expression in paired sequential core biopsies of primary, untreated breast cancer

  No change Reduced expression (no switch)a Increased expression (no switch)a Switchb Missing data
ER 17 2 3 0 6
PR 17 6 3 0 6
  1. Notes
  2. aNo switch either by Allred score or Quickscore
  3. bSwitch only using Allred score