Down Syndrome and Autoimmune Disease

Down syndrome, the most common genetic cause of intellectual disability, is linked to a high prevalence of autoimmune disorders due to immune dysregulation associated with chromosome 21 triplication. This includes elevated rates of autoimmune thyroid disease, celiac disease, type I diabetes, autoimmune skin disease, and neurological conditions. For instance, Hashimoto's thyroiditis affects 13-34% of individuals with Down syndrome compared to 3% of the neurotypical population, while alopecia areata affects 27.7% compared to 2%. As life expectancy for those with Down syndrome increases, understanding the epidemiology, clinical features, and management of these conditions is crucial for improving their quality of life. Early identification and management of these chronic autoimmune conditions are essential.