SLC2A1 and nonpapillary renal cell carcinoma: Solute carrier family 2 (facilitated glucose transporter), member 1 (SLC2A1 or GLUT1, Gene ID 6513; mRNA increased 5-fold in TRACK kidneys and 2.5-fold in ccRCC) is not one of the top 30 ranked genes in human ccRCC according to Oncomine data, but SLC2A1 has been well studied in ccRCC and is known to play an important role in altered metabolism.