Our results, showing a positive trend between intraepithelial PD-L1 expression and outcome, align with a recent study (Esfahani et al.[18]) which assessed the expression of PD-L1 in high grade serous ovarian cancer (HGSOC).They also confirmed the significant positive prognostic impact of PD-1 and PD-L1 mRNA expression. This evidence concerns the gene CD274 and ovarian serous adenocarcinoma.