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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
31 Center Drive, MSC 2560
Bethesda, MD 20892-2560
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

MUMS National Parent-to-Parent Network
150 Custer Court
Green Bay, WI 54301-1243
Tel: (920)336-5333
Fax: (920)339-0995
Tel: (877)336-5333

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
Tel: 020 7486 0341
Fax: 020 7224 2012

Gastroparesis & Dysmotilities Association
5520 Dalhart Hill N.W.
Calgary, AB, T3A 1S9
Tel: 403-247-3215

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

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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