Children's Hospital Colorado
Rett Clinic

Rett Syndrome

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What is Rett syndrome?

Rett syndrome is a neurological and developmental condition. There are several types of Rett syndrome.

What causes Rett syndrome?

Rett syndrome is a clinical diagnosis, meaning that it’s based on signs and symptoms.

Most of the time, this condition involves a change or misspelling in a gene called the MECP2 gene, which occurs on the X chromosome. The MECP2 gene carries instructions to make the MECP2 protein. The change in the MECP2 gene results in the MECP2 protein working less than it should. This is called a loss-of-function change.

Even though this is a genetic disorder, the change on the gene is usually new to the child and not passed down from parents. In other words, a new spelling mistake happened around the time the egg and sperm came together. This isn’t caused by something the parents did or didn’t do.

Very rarely (less than 1% of the time), the mother may carry the gene but doesn’t have symptoms of the disorder.

Who gets Rett syndrome?

Rett syndrome usually affects females, occurring about one in every 9,000 to 15,000 live female births in the United States.

Males can also be affected, but they are so rare that we don’t know how often they have it. Males with Rett syndrome can have the same symptoms as girls, but sometimes they’re more severe.

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Get to know our pediatric experts.

Jennifer Coffman, CPNP-AC

Jennifer Coffman, CPNP-AC

Certified Pediatric Nurse Practitioner

Patrick Romani, PhD

Patrick Romani, PhD

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Anastacia Wall, PA-C

Anastacia Wall, PA-C

Physician Assistant

Chelsey Stillman, PA-C

Chelsey Stillman, PA-C

Physician Assistant