TARDBP and progressive pseudorheumatoid arthropathy of childhood: Clinical strategies for distinguishing bvFTD from PPD in cases of late-onset behavioral changes are similar for all pathological subtypes; however, the presence of delusions and hallucinations is particularly concerning for both the sporadic and genetic forms of TDP-43-related disease.6,79Table 1 lists some of the red flags to look for during clinical assessment.