TACSTD2 and breast cancer: Analysis of 2061 ERpos breast cancers using the Kaplan–Meier Plotter indicates that low levels of TACSTD2 mRNA are associated with decreased survival (p = 0.018; Additional file 10: Figure S4), while analysis of 801 ERneg breast cancers provides the opposite result: low levels of TACSTD2 are associated with increased survival (p = 0.083; Additional file 10: Figure S4).