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Evolution of CTC and CSC enumeration in relation to CT scans of patients (A) P-19 and (B) P-34. (C) and (D) are the CT scans of the two patients, respectively, before treatment, while (E) and (F) are the images after treatment, demonstrating the disease progression (C and E) or response to therapy (D and F). Liver metastases are the dark spots in the liver identified by the red circles.
