Table 2.

Expression profile of circulating tumor cells in breast cancer patients compared with the primary tumor

		Circulating tumor cells		Primary tumor (n = 58)		Concordance (%)
	n	n	%	n	%
ER-positive	48	12	25	45	78	29
PR-positive	48	2	2	41	71	25
HER2-positive	58	22	38	9	16	53
Muc-1-positive	58	31	53	-	-	-
GA 73.3-positive	58	32	55	-	-	-

ER, estrogen receptor; HER2, human epidermal growth factor receptor 2; PR, progesterone receptor.