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Diseases

Genetic and Rare Diseases Information Center (GARD)

Chromosome 9p duplication


Other Names for this Disease
  • Duplication 9p
  • Trisomy 9p
  • 9p duplication
  • 9p trisomy
  • Partial trisomy 9p
See Disclaimer regarding information on this site. Some links on this page may take you to organizations outside of the National Institutes of Health.

Overview

Chromosome 9p duplication is a chromosome abnormality that occurs when there is an extra copy of genetic material on the short arm (p) of chromosome 9. The severity of the condition and the signs and symptoms depend on the size and location of the duplication and which genes are involved. Features that often occur in people with chromosome 9p duplication include developmental delay, intellectual disability, behavioral problems and distinctive facial features. Chromosome testing of both parents can provide more information on whether or not the duplication was inherited. In most cases, parents do not have any chromosomal anomaly. However, sometimes one parent is found to have a balanced translocation, where a piece of a chromosome has broken off and attached to another one with no gain or loss of genetic material. The balanced translocation normally does not cause any signs or symptoms, but it increases the risk for having an affected child with a chromosomal anomaly like a duplication. Treatment is based on the signs and symptoms present in each person.[1][2]

This page is meant to provide general information about 9p duplications. You can contact GARD if you have questions about a specific duplication on chromosome 9. To learn more about chromosomal anomalies please visit our GARD webpage on FAQs about Chromosome Disorders
Last updated: 12/21/2015

References

  1. Chromosome 9, Trisomy 9p (Multiple Variants). NORD. 2015; http://rarediseases.org/rare-diseases/chromosome-9-trisomy-9p-multiple-variants/.
  2. Chromosome 9p duplication. Unique. 2011; http://www.rarechromo.org/information/Chromosome%20%209/9p%20duplications%20FTNW.pdf. Accessed 12/21/2015.
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Basic Information

  • Genetics Home Reference (GHR) contains information on Chromosome 9p duplication. This website is maintained by the National Library of Medicine.
  • The National Organization for Rare Disorders (NORD) is a federation of more than 130 nonprofit voluntary health organizations serving people with rare disorders. Click on the link to view information on this topic.
  • 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 9p duplication.

In Depth Information

  • PubMed is a searchable database of medical literature and lists journal articles that discuss Chromosome 9p duplication. Click on the link to view a sample search on this topic.
Other Names for this Disease
  • Duplication 9p
  • Trisomy 9p
  • 9p duplication
  • 9p trisomy
  • Partial trisomy 9p
See Disclaimer regarding information on this site. Some links on this page may take you to organizations outside of the National Institutes of Health.