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

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

	No change	Reduced expression (no switch)^a	Increased expression (no switch)^a	Switch^b	Missing data
ER	17	2	3	0	6
PR	17	6	3	0	6

ISSN: 1471-2407