However, we detected no significant associations between PD-L1 overexpression and sex (OR = 0.92, 95% CI 0.73–1.16; P = 0.48), T stage (OR = 0.96, 95% CI 0.60–1.53; P = 0.86), N stage (OR = 1.26, 95% CI 0.80–2.00; P = 0.31), TNM stage (OR = 0.99, 95% CI 0.72–1.38; P = 0.97), tumor grade (OR = 1.01, 95% CI 0.66–1.54; P = 0.95), lymphatic invasion (OR = 1.15, 95% CI 0.81–1.65; P = 0.44), venous invasion (OR = 1.06, 95% CI 0.57–2.92; P = 0.80), and neoadjuvant treatment (OR = 1.28, 95% CI 0.57–2.92; P = 0.55). Here, CD274 is linked to neoplasm.