CD68 and Parkinson disease: PD patients showed numerous and widespread CD68 positive amoeboid microglia in the SN, significantly more than in the iLBD and in control cases (Figure 1f; Figure 2b; PD vs iLBD p = 0.035, PD vs Ctr p = 0.000; PD Mean = 80.6 ± 12.9).