Validation of Androgen Receptor loss as a risk factor for the development of brain metastases from ovarian cancers
Abstract Background Central nervous system (CNS) spreading from epithelial ovarian carcinoma (EOC) is an uncommon but increasing phenomenon. We previously reported in a small series of 11 patients a correlation between Androgen Receptor (AR) loss and localization to CNS. Aims of this study were: to confirm predictive role of AR loss in an independent validation cohort; to evaluate if AR status impacts on EOC survival. Results We collected other 29 cases and 19 controls as validation cohort. In this independent cohort at univariate analysis, cases exhibited lower expression of AR, considered both as continuous ( p <0.001) and as discrete variable (10% cut-off: p <0.003; Immunoreactive score: p <0.001). AR negative EOC showed an odds ratio (OR) = 8.33 for CNS dissemination compared with AR positive EOC. Kaplan-Meier curves of the whole dataset showed that AR<10% significantly correlates with worse outcomes (p=0.005 for PFS and p=0.002 for brain PFS (bPFS) respectively). Comparison of AR expression between primary tissue and paired brain metastases in the whole dataset did not show any statistically significant difference. Conclusions AR’s deficiency confirms its predictive role for CNS involvement from EOC in an independent cohort of cases and controls. Early assessment of AR status could improve clinical management and patients’ prognosis.