GPX4 and neoplasm: Multivariate analysis of these factors revealed that tumor size (hazard ratio (HR): 2.386, 95% confidence interval (CI): 1.328–4.286, p = 0.004), 4-HNE score 0 (HR: 2.726, 95% CI: 1.127–6.596, p = 0.026), and relatively high GPX4 expression (HR: 2.418, 95% CI: 1.379–4.242, p = 0.002) were independent predictive factors for poor prognosis.