MAPT and dementia: In Lewy body disease, the prevalence of high Thal phase and low Braak stage co-pathology has been reported to range from 3.2% (21/652 cases, Thal 4–5 with Braak Stage 0–II) to 4.5% (1/22 cases, Thal 4 with Braak II).58,59 Kotzbauer et al. 60 reported that 19 of 32 patients (59%) with Parkinson’s disease dementia exhibited Aβ deposition (Braak amyloid Stages B and C) but little to moderate tau deposition (Braak NFT Stages 0–IV), although Thal phases were not reported in their cohort.