Consistent with a more luminal-specific signature, despite both marking EMT phenotypes, not more than six splicing events were found in common between the two splicing signatures (ATP5C1, CTNND1, KIF13a, PLOD2, SEC31a and SPAG9), which further supports the specificity of our newly identified splicing signature for basal-like triple negative breast cancer. This evidence concerns the gene SPAG9 and triple-negative breast carcinoma.