2. Laboratory data Laboratory data included ApoE genotype in n=20 patients and cerebrospinal fluid (CSF) analysis (n=25 patients). In addition to the standard test, CSF analysis included Alzheimer's disease (AD) biomarkers study: results were compared with series of patients with AD, CAA and control patients (Charamidou, JAD 2016) (Renard, JAD, 2016). Cerebral biopsy was performed in 6 patients.