To analyse whether Sox2 expression level (by probe 214178_s_at) correlates with distant metastasis free survival in breast cancer patients, we used the Kaplan-Meier analysis from IBM SPSS software to analyse the relationship between SOX2 protein levels and 5-year survival rates in 471 patients, and the patients data used for analysis derives from previous study [51]. This evidence concerns the gene SOX2 and breast carcinoma.