CTC monitoring during neoadjuvant chemotherapy in a patient with breast cancer. AC: doxorubicin + cyclophosphamide, dd: dose dense, T: paclitaxel, CTC+: CTC positivity, EA: axilla exenteration, dg: diagnosis, G: grade, TNBC: triple negative breast cancer, IDC: invasive ductal carcinoma, markers of stem cells: CD44/CD24, VIM (vimentin), ALDH (aldehyddehydrogenase), markers of epithelial cells: KRT18/19 (keratins), MUC1 (mucin), markers of chemoresistance: see Table 2.