Some FTD syndromes strongly associate with FTLD-tau (i.e., PSP-RS) or FTLD-TDP (i.e., FTD-ALS) [4], but bvFTD is just as likely to be caused by either proteinopathy (with a small percentage of cases caused by rarer FTLD pathologies). Here, MAPT is linked to behavioral variant of frontotemporal dementia.