What is Mosaic Down Syndrome?
Mosaic Down Syndrome represents 2 to 4% of all cases of people with Down Syndrome. This occurs when a person has a certain percentage of translocation cells with the remaining cells unaffected. meaning people with mosaic down syndrome have a certain percentage of cells with the extra 21 chromosome. The physical characteristics of mosaic down syndrome vary from having similar characteristics of a person with down syndrome to almost none.