Costello syndrome is a genetic disorder that affects your child’s appearance, development, growth and intellect. It can also affect your child’s heart, skin and joints.
Costello syndrome is caused by a mutation (change) in the HRAS gene (piece of DNA). In most cases, the change happens at random. Costello syndrome is not caused by anything you or your partner did.
The symptoms of Costello syndrome can affect your child’s body and development. Symptoms can be different for every person.
Rev. 8/2020. Mass General for Children and Massachusetts General Hospital do not endorse any of the brands listed on this handout. This handout is intended to provide health information so that you can be better informed. It is not a substitute for medical advice and should not be used to treatment of any medical conditions.