Fig. 2

Correlations between absolute CTC count and downstream CTC characterization. a Correlation between the number of CTC detected and the number of CTC with interpretable FISH results. b Correlation, in the 14 patients with ≥ 1 HER2_amp CTC at the screening step, between the number of (i) CTC, (ii) CTC with interpretable FISH result, and (iii) HER2_amp CTC. b Correlation between the number of CTC detected and the number of JER2^amp CTC for the 14 patients with ≥ 1 HER^amp CTC detected. For each patient, the number of CTC with interpretable FISH results is shown in brackets.