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Table 2 Comparison of HER2 status between tumor tissue and CTCs

From: Circulating tumor cells in HER2-positive metastatic breast cancer patients: a valuable prognostic and predictive biomarker

CTC HER2

Tumor tissue HER2

Total

+

-

3+ >30%

13

0

13

3+ ≤30%

14

9

23

Total

27

9

36

  1. χ2 = 12.07, P = 0.0005.