Arnold-Chiari Malformation

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Arnold-Chiari Malformation

National Organization for Rare Disorders, Inc.

Important
It is possible that the main title of the report Arnold-Chiari Malformation 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

  • Arnold-Chiari Malformation
  • Cerebellomedullary Malformation Syndrome
  • ACM

Disorder Subdivisions

  • Chiari Type I (Chiari Malformation I)
  • Chiari Type II (Chiari Malformation II)

General Discussion

Arnold-Chiari malformation is a rare malformation of the brain that is sometimes, but not always, apparent at birth. It is characterized by abnormalities in the area where the brain and spinal cord meet that cause part of the cerebellum to protrude through the bottom of the skull (foramen magnum) into the spinal canal. This interferes with the flow of cerebral spinal fluid to and from the brain, leading to accumulation of cerebral spinal fluid in the empty spaces of the spine and brain. The portion of the cerebellum that protrudes into the spinal canal can become elongated and is called the "cerebellar tonsils" because it resembles the tonsils.

There are four types of Chiari malformation. Depending on the type, the impact on the affected individual may range from mild to severe.

Resources

American Syringomyelia & Chiari Alliance Project
P.O. Box 1586
Longview, TX 75606-1586
Tel: (903)236-7079
Fax: (903)757-7456
Tel: (800)272-7282
Email: info@asap.org
Internet: http://www.asap.org

March of Dimes Birth Defects Foundation
1275 Mamaroneck Avenue
White Plains, NY 10605
Tel: (914)997-4488
Fax: (914)997-4763
Tel: (888)663-4637
Email: Askus@marchofdimes.com
Internet: http://www.marchofdimes.com

Spina Bifida Association of America
4590 MacArthur Boulevard NW
Suite 250
Washington, DC 20007-4226
Tel: (202)944-3285
Fax: (202)944-3295
Tel: (800)621-3141
Email: sbaa@sbaa.org
Internet: http://www.sbaa.org

Hydrocephalus Association
870 Market Street
Suite 955
San Francisco, CA 94102
USA
Tel: (415)732-7040
Fax: (415)732-7044
Tel: (888)598-3789
Email: info@hydroassoc.org
Internet: http://www.hydroassoc.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
Email: me20t@nih.gov
Internet: http://www.ninds.nih.gov/

Canadian Syringomyelia Network
69 Penny Crescent
Markham
Ontario, L3P 5X7
Canada
Tel: (905) 471-8278
Fax: (905) 944-4844
Email: barb@csn.ca
Internet: http://www.csn.ca

Hydrocephalus Support Group, Inc.
P.O. Box 4236
Chesterfield, MO 63006-4236
USA
Tel: (636)532-8228
Fax: (314)251-5871
Email: hydrob@earthlink.net

Birth Defect Research for Children, Inc.
800 Celebration Ave, Suite 225
Orlando, FL 34747
USA
Tel: (407)566-8304
Fax: (407)895-0824
Email: staff@birthdefects.org
Internet: http://www.birthdefects.org

MUMS National Parent-to-Parent Network
150 Custer Court
Green Bay, WI 54301-1243
USA
Tel: (920)336-5333
Fax: (920)339-0995
Tel: (877)336-5333
Email: mums@netnet.net
Internet: http://www.netnet.net/mums/

World Arnold Chiari Malformation Association
31 Newtown Woods Road
Newtown Square, PA 19073
Tel: (610)353-4737
Email: chiari-owner@yahoogroups.com
Internet: http://www.wacma.com

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
Email: http://rarediseases.info.nih.gov/GARD/EmailForm.aspx
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

American Association of Neurological Surgeons
5550 Meadowbrook Drive
Rolling Meadows, IL 60008-3852
Tel: (847)378-0500
Fax: (847)378-0600
Tel: (888)566-2267
Email: info@aans.org
Internet: http://www.NeurosurgeryToday.org and http://www.aans.org

Conquer Chiari
320 Osprey Court
Wexford, PA 15090
USA
Tel: (724)940-0116
Fax: (724)940-0172
Email: director@conquerchiari.org
Internet: http://www.conquerchiari.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:  4/19/2008
Copyright  1986, 1995, 2002, 2005 National Organization for Rare Disorders, Inc.

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