GJA1 and neoplasm: The diagnostic significance of GJA1 in various tumor types was evaluated by ROC curves (Figure 2) with findings revealing a certain accuracy (AUC > 0.7) of GJA1 when predicting eight different tumor types, including KICH (AUC = 0.722) (Figure 2A), KIRC (AUC = 0.874) (Figure 2B), HNSC (AUC = 0.826) (Figure 2C), LIHC (AUC = 0.787) (Figure 2D), LUAD (AUC = 0.715) (Figure 2E), THCA (AUC = 0.790) (Figure 2F), PRAD (AUC = 0.811) (Figure 2G), CHOL (AUC = 0.966) (Figure 2H).