There were 11 studies (579 patients) where all samples (100%) demonstrated positive staining for GLUT-1 [27,43,51,52,56,59,61,63,71,72,76,80] and a further 11 studies reported GLUT-1 expression in 70%–98% of tumour samples [23,53,55,60,64,73,74,75,77,78,79]. Here, SLC2A1 is linked to neoplasm.