HDAC9 and cancer: HHC patients can be treated with HDAC inhibitors such as valproic acid, TSA, panobinostat, ITF2357, resminostat, givinostat, abexinostat, CUDC-101, and pracinostat that have given encouraging results in HCC patients because aberrant expression of HDAC is higher in cancer patients [101, 106, 171–174].