For Ashley Zambelli, a surprise diagnosis allowed her to have an even more special bond with her children. The Michigan-based mom, 23, recently found out she has Mosaic Down syndrome, a condition in ...

Medically reviewed by Nicholas R. Metrus, MD Key Takeaways 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 ...

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 ...

Down syndrome is a condition in which a person has a fully or partially duplicated copy of chromosome 21. (A chromosome is a structure made up of DNA and proteins found in the nucleus of each cell.) ...

Fetal alcohol syndrome (FAS) and Down syndrome are both conditions that are present at birth. While they both affect facial appearance, development, and physical health, they have different causes.