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Lennox-Gastaut Syndrome

National Organization for Rare Disorders, Inc.

Important

It is possible that the main title of the report Lennox-Gastaut 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

  • LGS

Disorder Subdivisions

  • None

General Discussion

Lennox-Gastaut syndrome (LGS) is a severe form of epilepsy that typically becomes apparent during infancy or early childhood. Affected children experience several different types of seizures most commonly atonic, tonic and atypical absence seizures. Children with Lennox-Gastaut syndrome may also develop cognitive dysfunction, delays in reaching developmental milestones and behavioral problems. Lennox-Gastaut syndrome can be caused by a variety of underlying conditions, but in some cases no cause can be identified. Lennox-Gastaut syndrome can be difficult to treat because it is resistant (refractory) to many kinds of antiseizure medications. Research is ongoing to identify and assess new therapies for Lennox-Gastaut syndrome.



There is no consensus in the medical literature on the exact definition of Lennox-Gastaut syndrome. Generally, three findings are necessary for the diagnosis: multiple generalized seizure types; a slow spike-and-wave pattern (less than 2.5 Hz); and cognitive dysfunction. The International League Against Epilepsy Task Force most recently classified the disorder as an epileptic encephalopathy. Epileptic encephalopathies are a group of disorders in which seizure activity leads to progressive psychomotor dysfunction.

Resources

Epilepsy Foundation

8301 Professional Place

Landover, MD 20785-7223

Tel: (866)330-2718

Fax: (877)687-4878

Tel: (800)332-1000

TDD: (800)332-2070

Email: ContactUs@efa.org

Internet: http://www.epilepsyfoundation.org



NIH/National Institute of Neurological Disorders and Stroke

P.O. Box 5801

Bethesda, MD 20824

Tel: (301)496-5751

Fax: (301)402-2186

Tel: (800)352-9424

TDD: (301)468-5981

Internet: http://www.ninds.nih.gov/



American Epilepsy Society

342 North Main Street

West Hartford, CT 06117-2507

Tel: (860)586-7505

Fax: (860)586-7550

Email: khucks@aesnet.org

Internet: http://www.aesnet.org



Genetic and Rare Diseases (GARD) Information Center

PO Box 8126

Gaithersburg, MD 20898-8126

Tel: (301)251-4925

Fax: (301)251-4911

Tel: (888)205-2311

TDD: (888)205-3223

Internet: http://rarediseases.info.nih.gov/GARD/



Madisons Foundation

PO Box 241956

Los Angeles, CA 90024

Tel: (310)264-0826

Fax: (310)264-4766

Email: getinfo@madisonsfoundation.org

Internet: http://www.madisonsfoundation.org



Intractable Childhood Epilepsy Alliance (ICE)

PO Box 365

250 Lewisville-Vienna Road

Lewisville, NC 27023

Tel: (336)918-9440

Fax: (336)946-1197

Internet: http://www.icepilepsy.org



LGS Foundation, Inc.

192 Lexington Avenue

New York, NY 10016

Tel: (718)374-3800

Email: christina@lgsfoundation.org

Internet: http://www.lgsfoundation.org



CURE: Citizens United for Research in Epilepsy

223 W. Erie

Suite 2SW

Chicago, IL 60654

Tel: (312)765-7118

Fax: (312)255-1801

Tel: (800)765-7118

Email: info@CUREepilepsy.org

Internet: http://www.CUREepilepsy.org



For a Complete Report

This is an abstract of a report from the National Organization for Rare Disorders (NORD). A copy of the complete report can be downloaded free from the NORD website for registered users. The complete report contains additional information including symptoms, causes, affected population, related disorders, standard and investigational therapies (if available), and references from medical literature. For a full-text version of this topic, go to www.rarediseases.org and click on Rare Disease Database under "Rare Disease Information".

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:  1/7/2011

Copyright  1992, 1993, 1994, 1995, 1996, 1998, 2002, 2011 National Organization for Rare Disorders, Inc.

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