GFAP and amyotrophic lateral sclerosis: The study of specimens from the dentate gyrus of the hippocampus using GFAP revealed higher numbers of marked cells in patients with ALS: 32 ± 5.03 cells/500 μm2 in controls vs 117 ± 26.24 cells/500 μm2 in the total ALS group (p < 0.01), 109.1 ± 23.19 cells/500 μm2 in ALS without FTD (p < 0.01), and 146.5 ± 7.5 cells/500 μm2 in ALS-FTD.