Down syndrome is a genetic disorder that occurs when a person receives an extra copy of their chromosome 21, known as Trisomy 21. The additional genetic material disrupts typical development, which ...

Mosaic Down syndrome has some cells with three copies of chromosome 21, and some with two instead of all three. Only about 1% to 2% of people with Down syndrome have mosaic Down syndrome. The severity ...

A new study identifies distinct molecular and immune subtypes across individuals with Down syndrome, offering new insights that could lead to personalized medicine approaches for the clinical ...

Emma McLean is a 6-year-old girl who loves Taylor Swift, reading books, playing the drums and hanging with her little sister. While Emma has Down syndrome — specifically a rare type called Mosaic Down ...