CD68 and glioblastoma: (E and F) The Iba1(−)/CD68high (GBM cells) in the GBM samples showed 680% higher integrated CD68 fluorescence (fluorescence per cell in arbitrary units X number of events) × 108 relative to the Iba1(+)/CD68low (TAM cells) (p = 1.7 × 10− 4).