Nomogram to predict 1-, 3- and 5-year cancer-specific survival in patients with RLMS (A). Receiver-operating characteristic curves (ROCs) and area under the curves (AUCs) of the nomogram and the AJCC 8th Staging system for predicting cancer-specific survival at 1-, 3-, and 5-year in training (B) and validation (C) cohorts respectively. Calibration plots at 1-, 3-, and 5- year (D) in the training cohort and 1-, 3-, and 5- year (E) in the validation cohort.