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Kaplan-Meier curves for progression-free survival (PFS) of patients according to CTC or mesenchymal CTC (MCTC) variations before and after surgery. (a) Perioperative CTC variation and PFS and (b) perioperative MCTC variation and PFS. CTC: circulating tumor cells; PFS: progression-free survival; MCTC: mesenchymal CTC.
