Table 2.

CTC detectability by stage.

Stage	CTC < 5	CTC ≥ 5	CTC ≥ 5%
I (n = 6)	5	1	17%
II (n = 12)	6	6	50%
III (n = 12)	1	11	92%
IV (n = 58)	2	56	97%

Distribution of iCTC counts over different stage groups.