CA9 and hepatocellular carcinoma: We also reported that the expression of K19, EpCAM and CAIX was significantly higher in residual viable HCCs with preoperative TACE compared to those without, and that K19, EpCAM, and CAIX were more frequently expressed in HCCs with a greater number of TACE sessions, suggesting that evaluation of these markers in biopsied HCC tissue might have an additional value in predicting HCC outcome, especially for TACE-treated cases [33].