The total microglial load (Iba1-positive), observed in the control group, was higher in the amygdala when compared to pure AD, pure DLB and mixed DLB + AD (p = 0.016, p < 0.001, p = 0.002, respectively), in the DG, CA3 and CA4 when compared to mixed DLB + AD (p = 0.045, p = 0.012, p = 0.015, respectively) and in the CA4 when compared to pure DLB (p = 0.012). The gene discussed is AIF1; the disease is Lewy body dementia.