Specifically, increased levels of region‐specific TSPO binding in numerous cortical areas are demonstrated in AD patients compared to healthy controls (Hamelin et al., 2016; Kreisl et al., 2013; Lyoo et al., 2015; Suridjan et al., 2015; Varrone et al., 2015; Yasuno et al., 2008). This evidence concerns the gene TSPO and Alzheimer disease.