Our previous study identified hypoxia‐related lncRNAs, including the novel hypoxic lncRNA KB‐1980E6.3, which maintains BCSCs stemness by stabilizing c‐MYC mRNA.[9] Here, we found a strong correlation between hypoxia‐induced lncRNA PCAT6 expression, BCSC stemness, and BC drug resistance. This evidence concerns the gene PCAT6 and breast cancer.