General-practice doctors and a neurologist said such mental deterioration was typical for a person with Down syndrome entering adulthood, recalled her mother, Marilyn Lesmeister. They said nothing ...

Alzheimer's disease poses a major threat to people with Down syndrome. Many develop the disease in their 40s and 50s, and most will get it if they live long enough. People with Down syndrome may ...

Down syndrome is a genetic condition that causes mild to significant physical and developmental problems. People with Down syndrome (DS) are born with an extra chromosome. Chromosomes are bundles ...