ArticleThe Indian journal of medical research2026
Programmed death ligand-1 (PD-L1) expression in serous ovarian carcinoma with clinicopathological associations.
Article in The Indian journal of medical research, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Background and objectives The prevalence and significance of programmed death-1 ligand (PD-L1) expression in serous ovarian carcinoma are not well established. This study aimed to evaluate PD-L1 expression using immunohistochemistry (IHC) in whole tissue sections of serous ovarian carcinoma and to correlate its expression with relevant clinicopathological characteristics. Methods A retrospective study of 30 cases was conducted at a tertiary care centre in New Delhi, India, over one yr. All cases were reviewed using HandE staining, and IHC for PD-L1 was performed manually on poly-L-lysine-coated slides using the PD-L1 (E1L3N®) XP® Rabbit monoclonal antibody. Additional clinicomorphological data were recorded and analysed. Results Based on the combined positive score (CPS) with a 1% cutoff, PD-L1 expression was observed in 33% of cases. PD-L1 expression demonstrated a positive correlation with higher FIGO stage and the presence of tumour-infiltrating lymphocytes (TILs) (P=0.029). Interpretation and conclusion PD-L1 may serve as a potential prognostic marker in serous ovarian carcinoma. Its expression could help identify patients who may benefit from targeted PD-L1-based therapies and contributes to a better understanding of the biological behaviour of ovarian carcinoma.
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