RBM15 and breast cancer: Consistent with these findings, immunohistochemical (IHC) staining of human BC tissue specimens and normal human breast tissue specimens from the same patients revealed that RBM15 expression levels were much higher in BC tissue specimens than in normal breast tissue specimens (Fig. 1e–g) and that TNBC cells exhibited much higher RBM15 expression than non-TNBC cells (Fig. 1f, g).