IFITM1 and nonpapillary renal cell carcinoma: Results indicated that IFITM1 was mainly expressed in NK cells, Treg and CD8+ T cells in four ccRCC single-cell cohorts, GSE111360, GSE121636, GSE139555 and GSE145281; the overall expression level of IL6, PCOLEC2 and RSAD2 seems to be very low; MX2 and SLC2A3 are expressed in various cells.