A progressive form of dementia characterized by the presence of protein deposits called Lewy bodies in the midbrain and cerebral cortex, and loss of cholinergic and dopaminergic neurons. The signs and symptoms overlap with Alzheimer and Parkinson disease. The disease is MONDO_0007488 (Lewy body dementia). Also known as: DLB, Lewy body disease, Senile dementia of the Lewy body type, cortical Lewy body disease, dementia with Lewy bodies, lewy body dementia, susceptibility to.