Lewy body dementia is a type of progressive dementia that takes its name from Lewy bodies, which are abnormal structures found in some nerve cells in the brain of people with this form of dementia. The symptoms of Lewy body dementia are often similar to those seen with Alzheimer's disease and Parkinson's disease. In fact, doctors are not yet certain if Lewy body dementia is a distinct condition or a variant of Alzheimer's or Parkinson's disease. Symptoms of Lewy body dementia may begin with visual hallucinations. Other symptoms associated with this type of dementia may include acute confusion, tremor, and memory loss. While there is no cure for Lewy body dementia, certain medications may help in the management of symptoms.