CA9 and neoplasm: Although we were not able to found any associations with the clinicopathological data of SCC in our previous studies with MCTs and CD147 [33, 34], other studies have found association of CD147, GLUT1 and CAIX expression with lymph-node metastasis [35, 52, 54], while CAIX was also associated with advanced tumour stage, greater invasion depth, undifferentiated tumour grade [52], as well as distant metastasis in early-stage cervical cancer [53].