A high pre-treatment plasma D-dimer level was recently identified as a poor prognostic factor in several malignancies. The aim of this study was to evaluate the prognostic significance of plasma D-dimer levels in epithelial ovarian cancer (EOC). Data of 199 patients were retrospectively analysed. The relationships between pre-treatment D-dimer levels and other clinical parameters and prognosis were evaluated. Univariate analysis identified age, pre-treatment plasma D-dimer level, massive ascites, residual tumours, pre-treatment CA125 level, histological type, and FIGO stage as predictors of overall survival. The multivariate analysis showed that a high pre-treatment plasma D-dimer level (p=.017), residual tumours (p < .001), and FIGO stage (p = .036) were independent risk factors of overall survival. Venous thromboembolism (VTE) did not influence overall survival (p=.091). High pre-treatment D-dimer levels are associated with a poor prognosis independent of VTE status in EOC patients, and might be a useful prognostic biomarker.Impact statementWhat is already known on this subject? In recent years, a high pre-treatment plasma D-dimer level has been identified as a prognostic factor in several malignancies, but only a handful of studies have assessed the role of pre-treatment plasma D-dimer levels in patients with EOC patients. Thus, the clinical significance and prognostic value of the plasma D-dimer level in EOC remain controversial, and there is also debate related to the association of the higher mortality rate among cancer patients with elevated D-dimer levels with VTE.What do the results of this study add? In our study, high pre-treatment D-dimer levels are associated with a poor prognosis independently of VTE in EOC patients.What are the implications of these findings for clinical practice and/or further research? The D-dimer level might emerge as a valuable prognostic biomarker, which will help doctors in the choice of initiating a more aggressive therapy, the combination of chemotherapy with anticoagulation therapy.

#	Concept	H-Index	Publications	Citations
1	Medicine	3	3	45
2	Obstetrics	3	3	45
3	Cell Biology	1	1	12
4	Molecular Genetics	1	1	10
5	Pathology	1	1	23

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