We analyzed the expression of RANK and RANKL proteins in two independent tissue‐microarray (TMA) collections containing all BC subtypes: IDIBELL (IDB) (n = 404; Martínez‐Aranda et al, 2015) and Nottingham Primary Series (NPS) (n = 1,895 samples, 298 included in the Molecular Taxonomy of Breast Cancer International Consortium (METABRIC); Curtis et al, 2012; Green et al, 2013). Here, TNFSF11 is linked to breast cancer.