It has been previously reported that SOX9 located in the cytoplasm abrogates the growth arrest response of HDAC inhibitors in basal-type breast cancer cells.12 To determine the effect of HDAC inhibitors on SOX9 localisation in TAMR cells, we used pan-HDAC inhibitor Trichostatin A (TSA) to treat TAMR cells. The gene discussed is HDAC9; the disease is breast cancer.