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Figure 6. The performance of three blood biomarkers in monitoring post-operative remission of TC. Blood samples of TC patients before and after the operation were collected. The performance of plasma sEV counts (A) and EPCAM⁺ sEVs (B), and serum Tg concentrations (C) in monitoring post-operative remission of TC was analyzed; (D) The chi-square analysis was conducted to evaluate the difference among the three biomarkers in monitoring TC remission. TC: Thyroid carcinoma; sEV: small extracellular vesicle; EPCAM: epithelial cell adhesion molecule; Tg: thyroglobulin; CPM: counts per million.