A total of 679 lncRNA were found to have prognostic value using univariate Cox analysis in 579 ER+ BC, whereas 5417 mRNA and lncRNA were found to be significantly differentially expressed in LCC9 and MCF-7 cell lines, only one common lncRNA C6orf99 was obtained by taking both sets to be the intersection (Fig. 5I). Here, ESR1 is linked to breast cancer.