Dementia with Lewy bodies describes several common disorders causing dementia. The name for the disease comes from the presence inside nerve cells of Lewy bodies. The disease has been given a variety of names - Diffuse Lewy body Disease - Cortical Lewy body Disease - Lewy Body Dementia - Senile Dementia Of Lewy Type - Lewy Body Variant of Alzheimer's Disease The main features of the condition include - development of dementia with features similar with those of Alzheimer's - development of some features of Parkinson's disease - fluctuation in condition on a day-to-day basis - early development of hallucinations