By comparing the mean diameter of Iba1+ cells in the glomerular layer, granular cell layer, and olfactory tract between controls, AD, PDD/DLB, and FTLD cases, we observed an increased diameter of Iba1+ cells in all three regions analyzed, however only reaching significance for the FTLD cases (Figures 4(a) and 4(b)). This evidence concerns the gene AIF1 and Alzheimer disease.