FLVCR2 expression increased in tumors, such as renal papillary cell carcinoma, renal clear cell carcinoma, and low-grade glioma (LGG), compared to that in matched healthy samples (Figure 6A), and FLVCR2 downregulation predicted the dismal OS for 518 LGG cases (Figure 6B). This evidence concerns the gene FLVCR2 and clear cell renal carcinoma.