Thus, we analyzed RANK and RANKL gene and protein expression in 76 PDXs from several BC collections (Derose et al, 2011; Zhang & Lewis, 2013; Bruna et al, 2016; Eyre et al, 2016; Gómez‐Miragaya et al, 2017; Gris‐Oliver et al, 2020). The gene discussed is TNFRSF11A; the disease is breast cancer.