The 20 Best Trisomy 17 Mosaicism Doctors in The United States

Trisomy 17 mosaicism is a chromosomal abnormality in which there are three copies of chromosome 17 in some cells of the body, rather than the usual two copies. It is often incorrectly called trisomy 17 (also referred to as full trisomy 17), which is when three copies of chromosome 17 are present in all cells of the body. Few cases of Trisomy 17 mosaicism have been described, most having been detected during pregnancy through a test called amniocentesis. Because the proportion and location of cells with trisomy 17 differs from case to case, the presence and severity of signs and symptoms may vary significantly from person to person.