Further studies using the GEPIA database revealed that the expression levels of SLC22A6, SLC22A7, SLC22A13, SLC25A4, SLC34A1, and SLC44A4 in ccRCC correlated with the clinical stage of the cancer, as shown in Figure 3(b). The gene discussed is SLC44A4; the disease is nonpapillary renal cell carcinoma.