As SLC4A4 was downregulated in ccRCC patients in TCGA-KIRC and was an independent prognostic factor for ccRCC, we tested SLC4A4 expression in ccRCC patient samples from our hospital by quantitative real-time polymerase chain reaction (qRT-PCR) and immunohistochemistry analyses. Here, SLC4A4 is linked to nonpapillary renal cell carcinoma.