ZNF217 and breast cancer: In support of this relationship, data from breast cancer patient cohorts show that high expression of ZNF217 is associated with worse survival (Győrffy et al. 2009; Frietze et al. 2014), while high expression of miR-503 is associated with improved survival (Antonov 2011; Lyng et al. 2012; Antonov et al. 2013).