Although correlations with DTI parameters in both diseases have been reported, white matter fibers that correlate with CSF amyloid β and tau have been detected for Alzheimer’s disease but not for iNPH (Hattingen et al., 2010; Koyama et al., 2012; Kamiya et al., 2016; Alm and Bakker, 2019). This evidence concerns the gene MAPT and early-onset autosomal dominant Alzheimer disease.