RNA sequencing data in The Cancer Genome Atlas (TCGA) from a cohort of breast cancer (n = 885) and adjacent untransformed tissue samples (N = 13) were analyzed by Nair et al.34, who reported 256, 288, and 411 tumor-specific circRNAs for TNBC, ER-positive, and Her-2- positive breast cancer subtypes, respectively. The gene discussed is ERBB2; the disease is breast cancer.