MAPT and dementia: Like the current study, they found increased cortical tau pathology in PSP with dementia compared with PSP without dementia.24 In that series, most patients presented with attention and memory deficits, with fewer showing language problems; only 2 patients had early behavioral problems.24 Although these previous studies had investigated the neuropathology of PSP with dementia, the current study is the first to focus exclusively on patients meeting clinical criteria for bvFTD.