What is Chromosome 22 trisomy mosaic?
• Chromosome 22 trisomy mosaic: A rare chromosomal disorder where three copies of chromosome 22 are present in some of the body’s cells instead of the normal two. Severity of symptoms is determined by how many cells have the extra chromosomal material. Chromosome 22 trisomy mosaic is listed as a “rare disease” by the Office of Rare Diseases (ORD) of the National Institutes of Health (NIH). This means that Chromosome 22 trisomy mosaic, or a subtype of Chromosome 22 trisomy mosaic, affects less than 200,000 people in the US population.
