- other primary degenerative diseases such as Parkinson's disease; dementia with Lewy bodies; corticobasal degeneration; frontotemporal dementia; multiple system atrophy; parkinsonism-dementia complex of Guam, Kii or Guadeloupe; Alzheimer's disease; amyotrophic lateral sclerosis; Creutzfeldt-Jakob Disease; Huntington's disease; Down's syndrome; etc.