how did lewy body dementia get its name
Dementia with Lewy bodies DLB is one of the three most common types of dementia, along with Alzheimer's disease and vascular dementia.[13][17][a] Together with Parkinson's disease dementia, it is one of two dementias classified as the Lewy body dementias.[4] It typically begins after the age of 50, and about 0.4% of people over 65 are affected.[2] In the latter stages of the disease, people with DLB may be unable to care for themselves.[18] Life expectancy following diagnosis is about eight years.[3] The abnormal deposits of protein that are the underlying mechanism of the disease were discovered in 1912 by Frederic Lewy, and diffuse Lewy body disease was first described by Kenji Kosaka in 1976.[8]