['Current prognostic molecular markers for epithelial ovarian cancer (EOC) are insufficient. The aim of the current study was to investigate the role of Sox11 in EOC.', 'Using an in silico transcriptomic screen, Sox11 was identified as a potential EOC biomarker. Sox11 protein expression was evaluated using immunohistochemistry (IHC) in 76 EOC cases, which were analysed using automated algorithms to develop a quantitative scoring model.', 'Sox11 mRNA expression was upregulated in EOC compared to normal tissues. Automated analysis of Sox11 in the EOC cohort revealed high expression of Sox11, in 40% of tumours, who had an improved recurrence-free survival (RFS) (p=0.002). Multivariate analysis confirmed that Sox11 was an independent predictor of improved RFS after controlling for stage and grade.'] Is the transcription factor Sox11 a prognostic factor for improved recurrence-free survival in epithelial ovarian cancer?