Synonyms

• Diaphyseal Aclasis
• EXT
• External Chondromatosis Syndrome
• Multiple Cartilaginous Exostoses
• Multiple Exostoses
• Multiple Exostoses Syndrome
• Multiple Osteochondromatosis

Disorder Subdivisions

• None

General Discussion

Hereditary multiple exostoses (HME) is a rare genetic disorder characterized by multiple bony growths or tumors (exostoses), often on the growing end (metaphysis) of the long bones of the legs, arms, and digits. These bony growths are covered by cartilage and usually continue to grow until shortly after puberty. Exostoses may lead to bone deformities, skeletal abnormalities, short stature, nerve compression and reduced range of motion. Hereditary multiple exostoses is inherited as an autosomal dominant genetic condition and is associated with abnormalities (mutations) in the EXT1 and EXT 2 genes.

Resources

NIH/National Arthritis and Musculoskeletal and Skin Diseases Information Clearinghouse
1 AMS Circle
Bethesda, MD 20892-3675
USA
Tel: 3014954484
Fax: 3017186366
Tel: 8772264267
TDD: 3015652966
Email: NIAMSinfo@mail.nih.gov
Internet: http://www.niams.nih.gov/Health_Info

MHE Coalition
8838 Holly Lane
Olmsted Falls, OH 44138-2701
USA
Tel: 4402356325
Email: CheleZ1@aol.com
Internet: http://www.mhecoalition.com

MHE and Me- A Support Group for Kids with Multiple Hereditary Exostoses
14 Stony Brook Dr
Pine Island, NY 10969
USA
Tel: 8452586058
Fax: 8452586058
Email: mheandme@yahoo.com
Internet: http://www.geocities.com/mheandme

MUMS (Mothers United for Moral Support, Inc) National Parent-to-Parent Network
150 Custer Court
Green Bay, WI 54301-1243
USA
Tel: 9203365333
Fax: 9203390995
Tel: 8773365333
Email: mums@netnet.net
Internet: http://www.netnet.net/mums/

MHE Research Foundation
79-77 Street
Brooklyn, NY 11209
Tel: (718)569-0479
Fax: (201)786-1758
Tel: (877)486-1758
Email: sarahziegler@mheresearchfoundation.org
Internet: http://mheresearchfoundation.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:  2/11/2008
Copyright  1993, 2000, 2008National Organization for Rare Disorders, Inc.