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Int J Mol Sci ; 25(8)2024 Apr 20.
Article in English | MEDLINE | ID: mdl-38674108

ABSTRACT

Early evidence suggests a strong impact of tumour-infiltrating lymphocytes (TILs) on both the prognosis and clinical behaviour of ovarian cancer. Proven associations, however, have not yet translated to successful immunotherapies and further work in the field is urgently needed. We aimed to analyse the tumour microenvironment of a well-characterised cohort of ovarian cancer samples. Tumour markers were selected owing to their comparative underrepresentation in the current literature. Paraffin-embedded, formalin-fixed tumour tissue blocks of 138 patients representative of the population and including early stage disease were identified, stained for CD3, CD20, CD68 and CD163 and analysed for both the stromal and intertumoral components. Data were statistically analysed in relation to clinical details, histological subtype, borderline vs. malignant status, survival and management received. Mean stromal CD3, total CD3 count, mean stromal CD20 and total CD20 count all correlated negatively with survival. Malignant ovarian tumours consistently demonstrated significantly higher infiltration of all analysed immune cells than borderline tumours. Assessment of the stromal compartment produced a considerably higher proportion of significant results when compared to the intra-tumoural infiltrates. Customary assessment of solely intra-tumoural cells in advanced stage disease patients undergoing primary debulking surgery should be challenged, with recommendations for future scoring systems provided.


Subject(s)
Carcinoma, Ovarian Epithelial , Lymphocytes, Tumor-Infiltrating , Ovarian Neoplasms , Tumor Microenvironment , Tumor-Associated Macrophages , Humans , Lymphocytes, Tumor-Infiltrating/immunology , Lymphocytes, Tumor-Infiltrating/metabolism , Lymphocytes, Tumor-Infiltrating/pathology , Female , Prognosis , Ovarian Neoplasms/pathology , Ovarian Neoplasms/immunology , Ovarian Neoplasms/mortality , Tumor-Associated Macrophages/immunology , Tumor-Associated Macrophages/metabolism , Tumor-Associated Macrophages/pathology , Middle Aged , Carcinoma, Ovarian Epithelial/pathology , Carcinoma, Ovarian Epithelial/immunology , Tumor Microenvironment/immunology , Aged , Adult , Biomarkers, Tumor , Antigens, CD/metabolism , Aged, 80 and over
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