The combined analysis of these studies revealed the expression of several genes, including carbonic anhydrase 9 (CA9), vascular cell adhesion molecule-1 (VCAM1), solute carrier family 17 member 3 (SLC17A3), intercellular adhesion molecule 1 (ICAM1), integrin subunit beta 8 (ITGB8), alpha kinase 2 (ALPK2), and vimentin (VIM), in ccRCC PTECs [14,18]. Here, CA9 is linked to nonpapillary renal cell carcinoma.