High postoperative AFP levels were associated with worse OS (OR = 0.16, 95% CI: 0.05–0.48) and RFS (OR = 0.18, 95% CI: 0.08–0.43) compared to low postoperative AFP levels in ovarian yolk sac tumor (OYST) patients [93]. The gene discussed is AFP; the disease is ovarian yolk sac tumor.