For example, SNPs of ERCC5 have been associated with the development of certain cancers, including BC.5 Nari et al showed that the ERCC5 rs2094258 polymorphism might damage the DNA repair mechanism by causing defects in nucleotide excision repair, which is closely related to the risk of BC.6 In addition, Sun et al found that polymorphisms caused by genetic variation of microRNA (miR)‐124 rs531564 affect the prognosis of cancer patients.7 As SNPs associated with cancer risk may affect prognosis, analysis of relevant SNPs may help to identify new biomarkers for the prognosis of cancer. Here, ERCC5 is linked to breast cancer.