Contrast-enhanced CT radiomics features to preoperatively identify differences between tumor and proximal tumor-adjacent and tumor-distant tissues of resectable esophageal squamous cell carcinoma.

"Declarations Ethics approval and consent to participateThe study was conducted according to the guidelines of the Declaration of Helsinki and approved by the Medical Ethics Committee of the Affiliated Hospital of the North Sichuan Medical College (approval number 2021ER044-1). Patient consent was waived by the Institutional Ethics Committee due to the retrospective study design. Consent for publicationAll authors gave consent for the publication of this paper. Competing interestsAll authors declare that they have no competing interests in this study. Competing interests All authors declare that they have no competing interests in this study."

"Funding This work was supported by the National Natural Science Foundation of China (grant no. 82271959) and the Nanchong-University Cooperative Research Project (grant no: 20SXQT0329)."