CA9 and neoplasm: From a pathological perspective, we observed the tumor itself and found that, apart from the differences in tumor residual rates between the 2 groups, the positive cases of carbonic anhydrase 9 (CAIX) and VETC in the T group (21/23 and 11/26) were significantly higher than those in the T+AI group (11/20 and 4/20, p=0.01 and 0.03, respectively, Figure 2A).