Clinical dataset analyses in our previous study revealed that higher JFK expression levels were associated with worse overall survival in basal-like breast cancer patients (Yan et al., 2015), so it will be interesting to further investigate whether JFK levels in, for example, diagnostic tumor biopsies may be useful for identifying basal-like breast cancers in patients, which are at increased risk of developing metastasis. This evidence concerns the gene FBXO42 and breast cancer.