SLC2A1 and neoplasm: GLUT1 expression was seen predominantly on tumor cells (median intensity grade, 2 [range, 1–3]; mean tumoral expression, 80% [range, 70%–100%]) and only slightly in the tumor stroma (median intensity grade, 0 [range, 0–2]; mean expression of stromal cells, <1% [range, <1%–10%]).