Down Syndrome Health Topics
Featured Conditions and Diseases
Often associated with mental retardation, Down syndrome is a condition occurring in 1 out of 800 live births. This eMedTV article takes an in-depth look at Down syndrome, including symptoms, risk factors, and treatment options.
As this eMedTV segment explains, mosaic trisomy 21 is a genetic variation that can cause Down syndrome. In this variation, the extra chromosome 21 is present in only some of the cells, which means that associated physical problems can vary.