Kaplan‐Meier estimates of the overall survival of TCGA patients using the six‐snoRNA signature. A, Kaplan‐Meier curves for the entire TCGA series patients with Fuhrman (I and II, III, and IV). Kaplan‐Meier curves for patients with Fuhrman I and II (B), Fuhrman III (C) and Fuhrman IV (D). E, Kaplan‐Meier curves for the entire TCGA series patients with haemoglobin (combined with normal and low‐level haemoglobin). Kaplan‐Meier curves for patients with normal haemoglobin (F) and low‐level haemoglobin (G). H, Kaplan‐Meier curves for the entire TCGA series patients with TNM stage (I and II, III and IV). Kaplan‐Meier curves for patients with TNM stage I (I), TNM stage II (J), TNM stage III (K) and TNM stage IV (L). M, ROC analysis of the sensitivity and specificity of the overall survival prediction by the six‐snoRNA risk score, TNM stage, Fuhrman and haemoglobin. N, The nomogram for predicting proportion of patients with 1‐, 3‐ and 5‐y OS (stage: 0 = stage I, 1 = stage II, 2 = stage III and 3 = stage IV; Fuhrman grade: 0 = Fuhrman grade I + II, 1 = Fuhrman grade III and 2 = Fuhrman grade IV; and haemoglobin: 0 = normal haemoglobin level and 1 = low haemoglobin level)