Fourteen MT-Rel genes (KIF4A, ASPM, KIF20A, KIF14, TPX2, KIF18B, KIFC1, AURKB, KIF2C, GTSE1, KIF15, KIF11, RACGAP1, STMN1) were found significantly up-regulated in breast tumors compared with paired adjacent normal tissue, and were overexpressed in the aggressive TNBC subtype compared with luminal breast tumors. The gene discussed is RACGAP1; the disease is breast neoplasm.