Results: FAS mRNA was associated with better overall survival (OS) in breast cancer (Hazard ratio (HR): 0.59 [0.47, 0.73]; p=1.5e-06), gastric cancer (HR: 0.65 [0.54, 0.77]; p=8e-07) and non-small-cell lung cancer (NSCLC) (HR: 0.78 [0.69, 0.89]; p=0.00016), especially in lung adenocarcinoma (HR: 0.64 [0.51, 0.81], p=1.7e-04), female lung cancer (HR:0.72 [0.57, 0.9], p=0.0049) and patients who have never smoked (HR: 0.39 [0.21, 0.7], p=0.0012). The gene discussed is FAS; the disease is breast carcinoma.