To ascertain expression levels of the GLUT transporter isoforms GLUT1, GLUT2, GLUT3 and GLUT4 in neoplastic tissues of patients with CRC, we first performed bioinformatics analyses of the SLC2A1, SLC2A2, SLC2A3 and SLC2A4 mRNA levels using the public RNA-seq datasets from TCGA and RNA microarray datasets from GEO. This evidence concerns the gene SLC2A1 and colorectal carcinoma.