Table 2.

Frequencies of the expression of the proteins in CTC1 and CTC2

Proteins	CTC1			CTC2
	Category	n	%	Category	n	%
	Negative	1	3.6	Negative	1	4
COX2	Positive	27	96.4	Positive	24	96
	Total	28	100	Total	25	100
	Negative	22	78.6	Negative	9	50
EGFR	Positive	6	21.4	Positive	9	50
	Total	28	100	Total	18	100
	Negative	12	46.2	Negative	6	33.3
ST6GALNAC5	Positive	14	53.8	Positive	12	66.7
	Total	26	100	Total	18	100
NOTCH1	Negative	13	40.6	Negative	11	40.7
	Positive	19	59.4	Positive	16	59.3
	Total	32	100	Total	27	100
	Negative	29	90.6	Negative	19	70.4
HER2	Positive	3	9.4	Positive	8	29.6
	Total	32	100	Total	27	100

Abbreviation: CTC = circulating tumor cells.