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ICC OS nomogram and calibration curve analysis. (A,B) The ICC OS and TTR nomogram comprising CA-199, lymph node metastasis and VETC/PD-L1 index in training cohort (n=214); (C,D) The calibration curves for predicting three-year and five-year OS in training cohort (n=214). ICC, intrahepatic cholangiocarcinoma; VETC, vessels encapsulate tumor clusters; OS, overall survival.
