Noonan Syndrome

Important
It is possible that the main title of the report Noonan Syndrome is not the name you expected. Please check the synonyms listing to find the alternate name(s) and disorder subdivision(s) covered by this report.

Synonyms

Female Pseudo-Turner Syndrome
Male Turner Syndrome
Turner Phenotype with Normal Chromosomes (Karyotype)
NS

Disorder Subdivisions

None

General Discussion

Noonan syndrome is a rare genetic disorder that is typically evident at birth (congenital). The disorder may be characterized by a wide spectrum of symptoms and physical features that vary greatly in range and severity. In many affected individuals, associated abnormalities include a distinctive facial appearance; a broad or webbed neck; a low hairline in the back of the head; and short stature. Characteristic abnormalities of the head and facial (craniofacial) area may include widely set eyes (ocular hypertelorism); vertical skin folds that may cover the eyes' inner corners (epicanthal folds); drooping of the upper eyelids (ptosis); a small jaw (micrognathia); a low nasal bridge; and low-set, prominent, abnormally rotated ears (pinnae). Distinctive skeletal malformations are also typically present, such as abnormalities of the breastbone (sternum), curvature of the spine (kyphosis and/or scoliosis), and outward deviation of the elbows (cubitus valgus). Many infants with Noonan syndrome also have heart (cardiac) defects, such as obstruction of proper blood flow from the lower right chamber of the heart to the lungs (pulmonary valvular stenosis). Additional abnormalities may include malformations of certain blood and lymph vessels, blood clotting and platelet deficiencies, mild mental retardation, failure of the testes to descend into the scrotum (cryptorchidism) by the first year of life in affected males, and/or other symptoms and findings.

Noonan syndrome is an autosomal dominant genetic disorder caused be abnormalities (mutations) in four different genes: PTPN11, KRAS, SOS1 and RAF1.

Resources

Human Growth Foundation
997 Glen Cove Avenue
Glen Head, NY 11545
Tel: (516)671-4041
Fax: (516)671-4055
Tel: (800)451-6434
Email: hgf1@hgfound.org
Internet: http://www.hgfound.org/

MAGIC Foundation for Children's Growth
6645 W. North Avenue
Oak Park, IL 60302
Tel: (708)383-0808
Fax: (708)383-0899
Tel: (800)362-4423
Email: mary@magicfoundation.org
Internet: http://www.magicfoundation.org

March of Dimes Birth Defects Foundation
1275 Mamaroneck Avenue
White Plains, NY 10605
Tel: (914)428-7100
Fax: (914)997-4763
Tel: (888)663-4637
Email: Askus@marchofdimes.com
Internet: http://www.marchofdimes.com

The Arc (a national organization on mental retardation)
1010 Wayne Ave
Suite 650
Silver Spring, MD 20910
Tel: (301)565-3842
Fax: (301)565-3843
Tel: (800)433-5255
TDD: (817)277-0553
Email: info@thearc.org
Internet: http://www.thearc.org/

American Heart Association
National Center
7272 Greenville Avenue
Dallas, TX 75231-4596
Tel: (214)373-6300
Fax: (214)373-0268
Tel: (800)242-8721
Email: inquire@heart.org
Internet: http://www.americanheart.org

Congenital Heart Anomalies, Support, Education, & Resources
2112 North Wilkins Road
Swanton, OH 43558
Tel: (419)825-5575
Fax: (419)825-2880
Email: chaser@compuserve.com
Internet: http://www.csun.edu/~hcmth011/chaser/chaser-news.html

Restricted Growth Association
P.O. Box 4744
Dorchester
Dorset, Intl DT2 9FA
United Kingdom
Tel: 01308 898445
Fax: 01308 898445
Internet: http://www.restrictedgrowth.co.uk

NIH/National Heart, Lung and Blood Institute Information Center
P.O. Box 30105
Bethesda, MD 20824-0105
Tel: (301)592-8573
Fax: (301)251-1223
Email: nhlbiinfo@rover.nhlbi.nih.gov

Noonan Syndrome Support Group, Inc.
P.O. Box 145
Upperco, MD 21155
Tel: (410)374-5245
Tel: (888)686-2224
Email: wanda@noonansyndrome.org
Internet: http://www.noonansyndrome.org

Children's Cardiomyopathy Foundation (CCF)
PO Box 547
Tenafly, NJ 07670
USA
Tel: 8668082873
Fax: 2012277016
Email: info@childrenscardiomyopathy.org
Internet: http://www.childrenscardiomyopathy.org

For a Complete Report:

This is an abstract of a report from the National Organization for Rare Disorders, Inc. ® (NORD). A copy of the complete report can be obtained for a small fee by visiting the NORD website. The complete report contains additional information including symptoms, causes, affected population, related disorders, standard and investigational treatments (if available), and references from medical literature. For a full-text version of this topic, see http://www.rarediseases.org/search/rdblist.html

The information provided in this report is not intended for diagnostic purposes. It is provided for informational purposes only. NORD recommends that affected individuals seek the advice or counsel of their own personal physicians.

It is possible that the title of this topic is not the name you selected. Please check the Synonyms listing to find the alternate name(s) and Disorder Subdivision(s) covered by this report.

This disease entry is based upon medical information available through the date at the end of the topic. Since NORD's resources are limited, it is not possible to keep every entry in the Rare Disease Database completely current and accurate. Please check with the agencies listed in the Resources section for the most current information about this disorder.

For additional information and assistance about rare disorders, please contact the National Organization for Rare Disorders at P.O. Box 1968, Danbury, CT 06813-1968; phone (203) 744-0100; web site www.rarediseases.org or email orphan@rarediseases.org

Last Updated: 11/12/2007
Copyright 1987, 1990, 1996, 1998, 2000, National Organization for Rare Disorders, Inc.

WebMD Medical Reference from the National Organization of Rare Disorders

Last Updated: November 12, 2007

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