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. 2021 May;10(5):1954–1961. doi: 10.21037/tcr-20-2880

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2021 Translational Cancer Research. All rights reserved.

Open Access Statement: This is an Open Access article distributed in accordance with the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International License (CC BY-NC-ND 4.0), which permits the non-commercial replication and distribution of the article with the strict proviso that no changes or edits are made and the original work is properly cited (including links to both the formal publication through the relevant DOI and the license). See: https://creativecommons.org/licenses/by-nc-nd/4.0/.

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Characteristics and differences between the SC and MC esophageal cancer patients with HNSCC. (A) Pie charts represent the significant differences in the location of HNSCC between the SC and MC group. (B) Scatter plots showing that 93.75% [30/32] of esophageal cancers occurred within 6 years of HNSCC diagnosis. (C) Survival analysis demonstrating no significant differences in survival time between the MC and SC group. HNSCC, head and neck squamous cell carcinoma; SD, standard deviation; SC, synchronous carcinoma; MC, metachronous carcinoma.