Both circUBXN7 and UBXN7 mRNA are derived from the same precursor RNA of UBXN7 gene through back splicing and canonical linear splicing respectively (Figure 1A), prompting us to investigate whether the circUBXN7 levels in BC tissues were correlated with the corresponding levels of UBXN7 mRNA. The gene discussed is UBXN7; the disease is breast cancer.