MAPT and Lewy body dementia: Comorbid Alzheimer's disease (AD) pathology is commonly observed, particularly in DLB, in the form of extracellular amyloid plaques, of amyloid‐beta (Aβ) peptide, along with neurofibrillary tangles (NFT) and neuropil threads of hyperphosphorylated tau (HPT) protein 42.