Chromosome 20, Trisomy

Common Name(s)

Chromosome 20, Trisomy

Chromosome 20, trisomy, (also called trisomy 20) is a condition in which a fetus or individual has an extra full or partial copy of chromosome 20 in some or all of of his/her cells. An extra full copy of chromosome 20 in all of a person's cells is rare, and almost all fetuses with this do not survive past the first trimester of pregnancy. The presence of an extra copy of only part of chromosome 20 is called partial trisomy 20; and an extra copy of chromosome 20 in only some of a person's cells is called mosaic trisomy 20. Mosaic trisomy 20 is the most common type of chromosome 20 trisomy and is one of the more common chromosomal abnormalities found during prenatal diagnostic testing. Studies have shown that the child is normal in the vast majority of prenatally diagnosed individuals. However, features that have been reported include spinal abnormalities (including spinal stenosis, vertebral fusion, and kyphosis), hypotonia (decreased muscle tone), lifelong constipation, sloped shoulders, and significant learning disabilities despite normal intelligence. Trisomy 20 usually results from an error that occurs when an egg or sperm cell develops (before fertilization); mosaic trisomy 20 usually results from errors in cell division soon after fertilization.
 

Advocacy and Support Organizations

 

Condition Specific Organizations

Following organizations serve the condition "Chromosome 20, Trisomy" for support, advocacy or research.

Hope for Trisomy 13 and 18

OUR MISSION The mission of Hope For Trisomy is to 1) FUND RESEARCH for rare trisomies and related chromosome disorders; 2) PROMOTE EDUCATION by developing programs that educate parents of children with Trisomy about options available to their child and teach them how to advocate for their child to receive all available treatment; 3) RAISE AWARENESS by creating and contributing to materials, literature, workshops, seminars, and conferences to educate the medical health professionals, the parents, and the public about Trisomy, so they have accurate and current information and resources available

Last Updated: 7 Aug 2013

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General Support Organizations

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How do you compare to others with this condition?

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Advocacy and Support Organizations

 

Condition Specific Organizations

Following organizations serve the condition "Chromosome 20, Trisomy" for support, advocacy or research.

Hope for Trisomy 13 and 18

OUR MISSION The mission of Hope For Trisomy is to 1) FUND RESEARCH for rare trisomies and related chromosome disorders; 2) PROMOTE EDUCATION by developing programs that educate parents of children with Trisomy about options available to their child and teach them how to advocate for their child to receive all available treatment; 3) RAISE AWARENESS by creating and contributing to materials, literature, workshops, seminars, and conferences to educate the medical health professionals, the parents, and the public about Trisomy, so they have accurate and current information and resources available

http://www.hopefortrisomy13and18.org

Last Updated: 7 Aug 2013

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General Support Organizations

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Scientific Literature

Articles from the PubMed Database

Research articles describe the outcome of a single study. They are the published results of original research.
The terms "Chromosome 20, Trisomy" returned 0 free, full-text research articles on human participants.

Reviews from the PubMed Database

Review articles summarize what is currently known about a disease. They discuss research previously published by others.
The terms "Chromosome 20, Trisomy" returned 0 free, full-text review articles on human participants.

 
 
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Symptoms, Diagnosis, and Treatment

There are currently no related results available in GeneReviews.

There are currently no related results available in Genetic Testing Registry.

 
 
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Clinical Trial Information This information is provided by ClinicalTrials.gov

There are currently no open clinical trials for this condition.