AFP and neoplasm: In addition, the prognostic characteristics constructed in this study might predict the different prognostic outcomes of two TCGA groups stratified by tumor grade (G1+G2 or G3+G4), sex (male or female), AFP content (< 20 or ≥ 20 ng/ml), age (> 60), T stage (T1+T2) and clinical stage (I + II).