How Down Syndrome Works Against Cancer

http://www.sciencenews.org/view/generic/id/43950/title/How_Down_syndrome_works_against__cancer

People born with Down Syndrome have an extra chromosome # 21. Most people have only two, one from their mother and one from their father, but people with Down Syndrome are born with a third. Chromosome 21 carries 231 genes, including some that may suppress cancer. A recent study shows that people with Down Syndrome are 1/10th as likely to get a solid-tumor cancer as people without the syndrome.