In endometrial cancer, no change in the FGF23 plasma concentration is observed (Cymbaluk-Płoska et al., 2020), whereas the FGF23 plasma concentration goes up in advanced-stage epithelial ovarian cancer (EOC) (Tebben et al., 2005), and a defined FGF23 SNP is associated with better prognosis in this tumor entity (Meng et al., 2014). The gene discussed is FGF23; the disease is neoplasm.