CBS News | What is Lewy body dementia? CBS News Taylor added that the disease can be difficult to diagnose since there is not currently a medical test to differentiate Lewy body dementia from other types of dementia, such as Alzheimer's disease and vascular dementia. Many of the symptoms associated ... Robin Williams' suicide 'was triggered by hallucinations from devastating form ... Robin Williams' Death Report Finds Lewy Body Dementia Understanding how Lewy Body Dementia affected Robin Williams |