It is still worth noting that the lnc-TRDMT1-5 expression was profoundly varied among the basal, luminal A/B and HER2-positive subtypes of BC in the TCGA database, indicating that the level of lnc-TRDMT1-5 expression is potentially related to expression levels of ER and HER2, which were consistent with our analyses of clinical characteristic. The gene discussed is ERBB2; the disease is breast cancer.