Frequency of brain regions in which regularly distributed clusters (RGC) of neuronal cytoplasmic inclusions (NCI) were either in the size range 400–800 μm or exhibited a more complex clustering pattern in which small clusters were aggregated to form larger clusters in various neurodegenerative disorders: AD Alzheimer’s disease, PiD Pick’s disease, CBD corticobasal degeneration, PSP progressive supranuclear palsy, DLB dementia with Lewy bodies, MSA multiple system atrophy, NIFID neuronal intermediate filament inclusion disease, FTLD-TDP frontotemporal lobar degeneration with TDP-43 proteinopathy, NFT neurofibrillary tangles, PB Pick bodies, LB Lewy bodies