Mosaic Down syndrome is a variant of Down syndrome. Down syndrome is a congenital (present at birth) genetic condition that occurs when a person has three copies of chromosome 21 instead of two ...

Once Zambelli was tested, it came back positive for mosaic Down syndrome, or trisomy 21 mosaicism/mosaic trisomy 21. According to the Stanford Children's Hospital, this form of Down syndrome is ...

Benny isn't your average boy from Newfoundland. He lives in a retirement home that his mother runs, he has an eighty-six-year-old best friend named Mr. Tom, he knows more about fixing boats than video ...