In our previous study, we have identified that the up‐regulation of a lncRNA signature consisting of nine lncRNAs (LINC00705, LINC00310, LINC00704, LINC00574, FAM74A3, UMODL1‐AS1, ARRDC1‐AS1, HAR1A and LINC00323) can predict recurrence of breast cancer.39 Therefore, we focused on LINC00310 in the present study. This evidence concerns the gene HAR1A and breast cancer.