The cause of Lewy body dementia isn't known, but the disorder may be related to Alzheimer's or Parkinson's disease.

  • Lewy bodies contain a protein associated with Parkinson's disease.
  • Lewy bodies often are present in the brains of people with Parkinson's disease, Alzheimer's disease and other dementias.
  • People who have Lewy bodies in their brains also have the plaques and tangles associated with Alzheimer's disease.
Apr. 17, 2013