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. 2020 Nov 25;21(1):68. doi: 10.3892/ol.2020.12329

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Copyright: © Jia et al.

This is an open access article distributed under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made.

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Figure 2. — PFS and OS times of patients stratified by post-radiation ctDNA or tumor biomarker status. Kaplan-Meier plots of (A) PFS and (B) OS times in patients with ESCC and treated with radiation therapy stratified by ctDNA status in the initial post-radiation plasma samples. Kaplan-Meier plots of (C) PFS and (D) OS times in patients with ESCC and treated with radiation therapy stratified by clinical biomarker status in the initial post-radiation plasma samples. PFS, progression free survival; OS, overall survival; ct, circulating tumor; ESCC, esophageal squamous cell carcinoma; HR, hazard ratio.