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Chromosome 9, Trisomy 9p (Multiple Variants)
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Copyright 1996, 1997, 2001
Synonyms of Chromosome 9, Trisomy 9p (Multiple Variants)
- Chromosome 9, Complete Trisomy 9P
- Chromosome 9, Partial Trisomy 9P, Included
- Chromosome 9, Trisomy 9pter-q11-13, Included
- Chromosome 9, Trisomy 9pter-q22-32, Included
- Dup(9p) Syndrome
- Duplication 9p Syndrome
- Rethore Syndrome (obsolete)
- Trisomy 9P Syndrome (Partial), Included
Disorder Subdivisions
General Discussion
This disease entry was made possible due to the generosity of the Robert Lee and Clara Guthrie Patterson Trust, through grant funds provided for the National Organization for Rare Disorders' "Pediatric Rare Disease Database Project."
Chromosome 9, Trisomy 9p is a rare chromosomal syndrome in which a portion of the 9th chromosome appears three times (trisomy) rather than twice in cells of the body. The trisomy may involve a portion of the short arm (9p), the entire short arm, or the short arm and a portion of the long arm (9q) of chromosome 9. (Each chromosome contains a short arm known as "p" and a long arm designated as "q.") Evidence suggests that, in many cases, associated symptoms and findings may be relatively similar among affected infants despite differing lengths of the trisomic (duplicated) segment of 9p. However, in those with larger trisomies (e.g., extending to middle or end [distal] regions of 9q), additional features may also be present that appear to correlate with the extent of the duplication.
Virtually all individuals with Trisomy 9p are affected by mental retardation and distinctive malformations of the skull and facial (craniofacial) region. In some instances, additional physical abnormalities may also be present, such as other skeletal defects, structural malformations of the heart that are present at birth (congenital heart defects), and/or other findings. In some cases, the trisomy appears to result from a balanced chromosomal rearrangement in one of the parents; in others, it is thought to arise from spontaneous (de novo) errors very early in embryonic development that occur for unknown reasons (sporadically).
Organizations related to Chromosome 9, Trisomy 9p (Multiple Variants)
- AmeriFace
PO Box 751112
Las Vegas NV 89136
Phone #: 702-769-9264
800 #: 888-486-1209
e-mail: info@ameriface.org
Home page: http://www.ameriface.org
- American Heart Association
7272 Greenville Avenue
Dallas TX 75231-4596
Phone #: 214-373-6300
800 #: 800-242-8721
e-mail: Review.personal.info@heart.org
Home page: http://www.americanheart.org
- Arc (a national organization on mental retardation)
1010 Wayne Ave
Suite 650
Silver Spring MD 20910
Phone #: 301-565-3842
800 #: 800-433-5255
e-mail: info@thearc.org
Home page: http://www.thearc.org/
- Congenital Heart Anomalies, Support, Education, & Resources, Inc. (CHASER, Inc.)
2112 North Wilkins Road
Swanton OH 43558
Phone #: 419-825-5575
800 #: --
e-mail: myer106w@wonder.em.cdc.gov
Home page: http://www.csun.edu/~hcmth011/chaser/chaser-news.html
- Craniofacial Foundation of America
975 East Third Street
Chattanooga TN 37403
Phone #: 423-778-9176
800 #: 800-418-3223
e-mail: info@craniofacialfoundation.org
Home page: http://www.craniofacialfoundation.org/www
- Genetic and Rare Diseases (GARD) Information Center
PO Box 8126
Gaithersburg MD 20898-8126
Phone #: 301-251-4925
800 #: 888-205-2311
e-mail: ordr@od.nih.gov
Home page: http://rarediseases.info.nih.gov/Default.aspx
- March of Dimes Birth Defects Foundation
1275 Mamaroneck Avenue
White Plains NY 10605
Phone #: 914-997-4488
800 #: 888-663-4637
e-mail: Askus@marchofdimes.com
Home page: http://www.marchofdimes.com
- SOFTWA (Support Organisation for Trisomy and Related Disorders)
None
None None None
Phone #: N/A
800 #: N/A
e-mail: softwa@arach.net.au
Home page: http://www.trisomy9.org
- Support Organization for Trisomy 13/18 and Related Disorders, UK
c/o Christine Rose
48 Froggatts Ride
Walmley
Sutton Coldfield
West Midlands Intl B76 2TQ SOFT
Phone #: 012-1-3-51-3122
800 #: --
e-mail: enquiries@soft.org.uk
Home page: http://www.soft.org.uk
- Support Organization for Trisomy 18, 13, and Related Disorders
2982 South Union Street
Rochester NY 14624-1926
Phone #: N/A
800 #: 800-716-7638
e-mail: barbv@trisomy.org
Home page: http://www.trisomy.org
- Trisomy 9 International Parent Support (9TIPS)
Alice Todd
4027 E. Piedmont Drive
Highland CA 92346
Phone #: 909-862-4470
800 #: --
e-mail: atoddna@sprynet.com
Home page: N/A
- UNIQUE - Rare Chromosome Disorder Support Group
P.O. Box 2189
Caterham
Surrey Intl CR3 5GN
Phone #: 44 -0 1-883 330766
800 #: --
e-mail: info@rarechromo.org
Home page: http://www.rarechromo.org
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