17p13.3 Duplication

Below is a summary for 17p13.3 Duplications observed in research publications. This is not meant to take the place of medical advice.

Click here for our full 17p13.3 Duplication Gene Guide

The online Gene Guide includes more information about 17p13.3 duplications such as the chance of having another child with this condition, behavior and development concerns linked to 17p13.3 duplication syndrome or specialists to consider for people with this condition. Share this resource with family members or your clinical providers.

What is 17p13.3 duplication syndrome?

17p13.3 duplication syndrome can affect communication, social, and learning skills. People who have 17p13.3 duplication syndrome may have:

  • Intellectual disability
  • Low muscle tone
  • Autism

What causes 17p13.3 duplication syndrome?

17p13.3 duplication syndrome happens when someone has an extra piece of chromosome 17, one of the body’s 46 chromosomes. Chromosomes are structures in our cells that house our genes.

Some people inherit a genetic change from a parent. In other people, small mistakes can occur when genes are being copied. Parts of the chromosomes can break off, make extra copies, or end up in a different order than expected. When this happens, it is called a “de novo”, or new, change. The child can be the first in the family to have the genetic change.

Do all people with 17p13.3 duplication syndrome have symptoms?

Not necessarily. Some people do not have any symptoms. Some people may not learn that they have this genetic change until it is found in their children.

How many people have 17p13.3 duplication syndrome?

As of 2020, doctors had described about 50 people who have 17p13.3 duplication syndrome. The first case was found in 2009. There are likely many more undiagnosed people who have the syndrome. Scientists expect to find more people who have the syndrome as access to genetic testing improves.

Do people with 17p13.3 duplication syndrome look different?

People who have 17p13.3 duplication syndrome may look a little bit different. Appearance can vary. Some people have a long face. Some children have features that are linked to low muscle tone in their face, such as droopy skin around the eyes and the eyelid.


Two-thirds of people who have 17p13.3 duplication syndrome have intellectual disability. Most of these cases are mild.


Almost one-third have autism. Some people have other behavior issues, including attention deficit hyperactivity disorder, temper tantrums, occasional obsessive compulsive disorder, and food seeking behaviors.


Muscle Tone

Almost everyone who has 17p13.3 duplication syndrome has low muscle tone, also known as hypotonia. 


Support Resources



GeneReviews are a great resource to bring to your child’s clinicians. These publications provide a summary of current research on genetic conditions and information on ongoing care.

There is currently no GeneReviews for 17p13.3 Duplication.


Research Article Summaries

We currently do not have any article summaries for 17p13.3 Duplication, but we add resources to our website as they become available.

The information available about 17p13.3 Duplication is limited, and families and doctors share a critical need for more information. As we learn more from children who have this gene change, we expect our list of resources and information to grow.

Full versions of published research articles can be found on PubMed. PubMed is a National Institutes of Health (NIH) online database that is free. It has a collection of both medical and scientific research articles. A PubMed search for 17p13.3 Duplication articles can be found here.


Research Opportunities

Simons Searchlight

Help the Simons Searchlight team learn more about 17p13.3 Duplication genetic changes by taking part in our research. You can learn more about the project and sign up here.

External Research Opportunity: FaceMatch

FaceMatch is a platform that helps parents and doctors contribute to an international secure image database of both undiagnosed and diagnosed children across the globe. *This study is not affiliated with Simons Searchlight. Learn more about FaceMatch.


Family Stories

We do not currently have any stories from 17p13.3 Duplication families.

Click here to share your family’s story!