2. Most Early-Onset Dementia Not Alzheimer's
Other neurodegenerative, autoimmune diseases are more often cause, study finds

3. Dementia  (Trust Mark: Doctor-Reviewed)
Dementia is a loss of brain function that occurs with certain diseases.• Reviewer: Luc Jasmin, MD, PhD, Departments of Anatomy & Neurological Surgery, University of California, San Francisco, CA. Review provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.

4. Lewy Body Dementia  (Trust Mark: Doctor-Reviewed)
Lewy body dementia (LBD) is a neurodegenerative disorder that can occur in persons older than 65 years of age, which typically causes symptoms of cognitive (thinking) impairment and abnormal behavioral changes.• Author: Laith Farid Gulli MD, Robert Ramirez DO, Nicole Mallory MS, PA-C