APOE and Alzheimer disease: In the present study, the Apo E genotype of autopsied patients was ε3/3 in seven patients (one in the CAA group, four in the AD + CAA group, and two in the less Aβ group), ε3/4 was in two patients (one in the AD group and another in the CAA group), and ε2/3 in a patient in the CAA group.