ERBB2 and breast cancer: In the present study, the expression of lncRNA DLEU2 and its correlation with ROR1 was analyzed using BC patient specimens and cell lines (which includes MCF-7, MB-231, BT-20, and HER2+ cells) and various bioinformatic tools, retrieved from ONCOMINE, TCGA, GEPIA, DAVID, LinkedOmics CCLE, and PubMed GEO databases.