Dementia with Lewy bodies (DLB) is a type of progressive and degenerative neurological disorder that primarily affects the person's cognitive abilities, behavior, and movement. Some of the synonyms used for DLB include Lewy Body Dementia, Diffuse Lewy Body Disease, and Corticobasal Degeneration and Parkinson's Disease Dementia. These terms are used interchangeably with DLB because they share similar symptoms and characteristics. The key feature of DLB is the formation of abnormal protein clumps called Lewy bodies in the brain, leading to the decline in memory, thinking, behavior, and motor functions. Despite the different names, all forms of Lewy body disorders have devastating effects on the patient's mental and physical health.