MAPT and Lewy body dementia: Beyond its influence on clinical and cognitive characteristics in DLB, concomitant tau burden was also associated with more severe medial temporal lobe atrophy (Burton et al., 2012, 2009), which is in keeping with longitudinal data showing accelerated rates of brain atrophy among a subset of DLB cases with substantial tau pathology (Nedelska et al., 2015).