Epidemiology
About half of all marker chromosomes are idic(15) but idic (15) in itself is one of the rare chromosome abnormalities. It is estimated that 1 out of 8000 babies are affected. This number includes the children with a large IDIC (15) marker as well as children with a small marker (without negative phenomena). There are organizations for families with idic(15) children that offer extensive information and support.
Read more about this topic: Isodicentric 15