Figure 6

The CK19⁺ cell number in peripheral blood of 15 patients with primary cancer before surgery and after chemotherapy. All the patients underwent surgery followed immediately by chemotherapy. The CK19⁺ cell numbers were tested before surgery, 7 days after chemotherapy and 90 days after chemotherapy.(A and C) Patients with CK19 positive cells before surgery; (B and D) Patients without CK19 positive cells before surgery. Different symbols represent different breast cancer patients. The data were analyzed by the K Related Samples Test, **, p < 0.01 (A).