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National Organization for Rare Disorders, Inc.


It is possible that the main title of the report Achalasia 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.


  • Cardiospasm
  • Dyssynergia Esophagus
  • Esophageal Aperistalsis
  • Megaesophagus

Disorder Subdivisions

  • None

General Discussion

Achalasia is a rare disorder of the esophagus, the tube that carries food from the throat to the stomach. It is characterized by enlargement of the esophagus, impaired ability to push food down toward the stomach (peristalsis), and failure of the ring-shaped muscle at the bottom of the esophagus, the lower esophageal sphincter (LES), to relax. It is the contraction and relaxation of the sphincter that moves food through the tube.


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



NIH/National Institute of Diabetes, Digestive & Kidney Diseases

Office of Communications & Public Liaison

Bldg 31, Rm 9A06

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Tel: (301)496-3583



Oley Foundation

214 Hun Memorial MC-28

Albany Medical Center

Albany, NY 12208-3478


Tel: (518)262-5079

Fax: (518)262-5528

Tel: (800)776-6539



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



3 St. Andrews Place

London, NW1 4LB

United Kingdom

Tel: 02074860341

Fax: 02072242012



Gastroparesis & Dysmotilities Association

5520 Dalhart Hill N.W.

Calgary, AB, T3A 1S9


Tel: 4032473215



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 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 or email

Last Updated:  9/23/2007

Copyright  1986, 1993, 1995, 1999, 2006, 2007 National Organization for Rare Disorders, Inc.

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