CA9 and neoplasm: CD147 was significantly associated with smaller tumor size (p = 0.009), GLUT1 was significantly associated with higher mitotic index (p = 0.011) and presence of metastasis (p = 0.004), CAIX was significantly associated with higher nuclear grade (p = 0.048) and presence of metastasis (p = 0.021), while CD44 showed no significant associations with the clinicopathological data.