The aim of this study was to evaluate cytokine levels (IL-2, IL-8, TNF-α, IL-5, IL-6 and IL-10) in the peritoneal fluid in non-neoplastic tumours, benign ovarian neoplasms and malignant ovarian neoplasms. Peritoneal fluid or ascites was collected from 117 patients with neoplastic and non-neoplastic ovarian tumours. Cytokine levels were assessed by ELISA. The unpaired groups were compared by the Kruskal-Wallis test with Dunn's post-test. Higher IL-6 levels were found in malignant neoplasms when compared to non-neoplastic tumours (=.0241). There was no significant difference in the evaluation of other cytokines. Therefore, higher IL-6 levels in peritoneal fluid are related to the diagnosis of ovarian cancer. Further studies should be performed to evaluate the profile of cytokines in the peritoneal fluid of patients with ovarian tumours, and may be a new diagnostic strategy and a future target for treatment.Impact statement Cytokines can be dosed in both the serum and peritoneal fluid, and in the ascitic fluid of women with ovarian neoplasia. Elevated levels of IL-6 were found in the ascitic fluid of patients with malignant ovarian tumours. To our knowledge, this is the first study in the literature that evaluates a large panel of cytokines in the peritoneal fluid (and not only in ascites), comparing non-neoplastic tumours, benign neoplasms and malignant ovarian neoplasms. The cytokine dosage in the peritoneal fluid should be considered to map a profile of inflammatory cytokines that permeate the peritoneal cavity of patients with ovarian cancer. The dosage of these cytokines can be a potential pre-surgical tumour marker. In addition, a better understanding of the pattern of cytokines around ovarian neoplasia may be targeted for further studies in the development of new therapies for ovarian cancer.

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http://dx.doi.org/10.1080/01443615.2019.1633516DOI Listing

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