Figure 3. Construct the risk prognostic model. (A) The heat maps of expression profiles of 21 prognostic lncRNAs. (B) The forest maps of expression profiles of 21 prognostic lncRNAs by univariate Cox regression analysis. (C) The LASSO coefficient profile of 21 necroptosis-related lncRNAs. (D) The 10-fold cross-validation for variable selection in the LASSO model. (E) The Sankey diagram of 21 prognostic lncRNAs and necroptosis genes. (F) The survival analysis of all patients. (G) The survival analysis of patients in the test group. (H) The survival analysis of patients in the train group. NRG, necroptosis gene. * P < 0.05; ** P < 0.01; *** P < 0.001.