Spearman correlation analysis revealed a significant negative association between miR-193b-3p and PrPc expression in lung cancer tissues (p = 0.017), and Kaplan–Meier survival analysis demonstrated that high PrPc (p = 0.039) or low miR-193b-3p (p = 0.027) expression correlated with poorer overall survival. This evidence concerns the gene PRNP and lung cancer.