National Center for Advancing and Translational Sciences Genetic and Rare Diseases Information Center, a program of the National Center for Advancing and Translational Sciences

Chromosome 16p13.3 duplication



Other Names:
16p13.3 duplication; Interstitial 16p13.3 duplication; 16p13.3 microduplication syndrome; 16p13.3 duplication; Interstitial 16p13.3 duplication; 16p13.3 microduplication syndrome; Distal duplication 16p; Distal trisomy 16p; Dup(16)(p13.3); Telomeric duplication 16p; Trisomy 16pter See More
Categories:

Chromosome 16p13.3 duplication is a chromosome abnormality that can affect many parts of the body. People with this condition have an extra piece of genetic material (duplication) on chromosome 16 at a location designated p13.3. The symptoms and severity vary from person to person because not everyone with a 16p13.3 duplication has the same amount of extra DNA. Possible symptoms include developmental delay, speech delay, joint abnormalities, characteristic facial features, attention deficit, autism spectrum disorders, and underlying health problems such as heart conditions. Most cases are not inherited and occur randomly. Less commonly, the duplication is inherited from a parent. Regardless, a person with the duplication can pass it on to his/her child. Treatment is based on the signs and symptoms present in each person.[1][2]
Last updated: 6/12/2017

This table lists symptoms that people with this disease may have. For most diseases, symptoms will vary from person to person. People with the same disease may not have all the symptoms listed. This information comes from a database called the Human Phenotype Ontology (HPO) . The HPO collects information on symptoms that have been described in medical resources. The HPO is updated regularly. Use the HPO ID to access more in-depth information about a symptom.

Showing of 24 |
Medical Terms Other Names
Learn More:
HPO ID
5%-29% of people have these symptoms
Autistic behavior 0000729
Hip dislocation
Dislocated hips
Dislocation of hip
[ more ]
0002827
Pectus excavatum
Funnel chest
0000767
Percent of people who have these symptoms is not available through HPO
Atrial septal defect
An opening in the wall separating the top two chambers of the heart
Hole in heart wall separating two upper heart chambers
[ more ]
0001631
Autosomal dominant inheritance 0000006
Bulbous nose 0000414
Camptodactyly
Permanent flexion of the finger or toe
0012385
Global developmental delay 0001263
Intellectual disability, mild
Mental retardation, borderline-mild
Mild and nonprogressive mental retardation
Mild mental retardation
[ more ]
0001256
Long face
Elongation of face
Increased height of face
Increased length of face
Vertical elongation of face
Vertical enlargement of face
Vertical overgrowth of face
[ more ]
0000276
Low-set ears
Low set ears
Lowset ears
[ more ]
0000369
Malar flattening
Zygomatic flattening
0000272
Midface retrusion
Decreased size of midface
Midface deficiency
Underdevelopment of midface
[ more ]
0011800
Pes cavus
High-arched foot
0001761
Protruding ear
Prominent ear
Prominent ears
[ more ]
0000411
Proximal placement of thumb
Attachment of thumb close to wrist
0009623
Ptosis
Drooping upper eyelid
0000508
Short nose
Decreased length of nose
Shortened nose
[ more ]
0003196
Short phalanx of finger
Short finger bones
0009803
Short toe
Short toes
Stubby toes
[ more ]
0001831
Sporadic
No previous family history
0003745
Tapered finger
Tapered fingertips
Tapering fingers
[ more ]
0001182
Upslanted palpebral fissure
Upward slanting of the opening between the eyelids
0000582
Ventricular septal defect
Hole in heart wall separating two lower heart chambers
0001629
Showing of 24 |
Last updated: 7/1/2020

If you need medical advice, you can look for doctors or other healthcare professionals who have experience with this disease. You may find these specialists through advocacy organizations, clinical trials, or articles published in medical journals. You may also want to contact a university or tertiary medical center in your area, because these centers tend to see more complex cases and have the latest technology and treatments.

If you can’t find a specialist in your local area, try contacting national or international specialists. They may be able to refer you to someone they know through conferences or research efforts. Some specialists may be willing to consult with you or your local doctors over the phone or by email if you can't travel to them for care.

You can find more tips in our guide, How to Find a Disease Specialist. We also encourage you to explore the rest of this page to find resources that can help you find specialists.

Healthcare Resources


Support and advocacy groups can help you connect with other patients and families, and they can provide valuable services. Many develop patient-centered information and are the driving force behind research for better treatments and possible cures. They can direct you to research, resources, and services. Many organizations also have experts who serve as medical advisors or provide lists of doctors/clinics. Visit the group’s website or contact them to learn about the services they offer. Inclusion on this list is not an endorsement by GARD.

Organizations Supporting this Disease


These resources provide more information about this condition or associated symptoms. The in-depth resources contain medical and scientific language that may be hard to understand. You may want to review these resources with a medical professional.

Where to Start

  • Genetics Home Reference (GHR) contains information on Chromosome 16p13.3 duplication. This website is maintained by the National Library of Medicine.
  • Unique is a source of information and support for families and individuals affected by rare chromosome disorders. Click on the link to view information about Chromosome 16p13.3 duplication.

In-Depth Information

  • The Monarch Initiative brings together data about this condition from humans and other species to help physicians and biomedical researchers. Monarch’s tools are designed to make it easier to compare the signs and symptoms (phenotypes) of different diseases and discover common features. This initiative is a collaboration between several academic institutions across the world and is funded by the National Institutes of Health. Visit the website to explore the biology of this condition.
  • Online Mendelian Inheritance in Man (OMIM) is a catalog of human genes and genetic disorders. Each entry has a summary of related medical articles. It is meant for health care professionals and researchers. OMIM is maintained by Johns Hopkins University School of Medicine. 
  • Orphanet is a European reference portal for information on rare diseases and orphan drugs. Access to this database is free of charge.
  • PubMed is a searchable database of medical literature and lists journal articles that discuss Chromosome 16p13.3 duplication. Click on the link to view a sample search on this topic.

Questions sent to GARD may be posted here if the information could be helpful to others. We remove all identifying information when posting a question to protect your privacy. If you do not want your question posted, please let us know.


  1. CHROMOSOME 16p13.3 DUPLICATION SYNDROME. OMIM. January 2012; http://www.omim.org/entry/613458.
  2. 16p13.3 duplications and microduplications. Unique. 2013; http://www.rarechromo.org/information/Chromosome%2016/16p13.3%20duplications%20and%20microduplications%20FTNW.pdf.