National Organization for Rare Disorders, Inc.
It is possible that the main title of the report Mandibuloacral Dysplasia is not the name you expected.
Mandibuloacral dysplasia (MAD) is an extremely rare genetic disorder characterized by underdevelopment (hypoplasia) of the lower jaw (mandible) and the collarbone (clavicle), bone loss at the ends of the fingers and toes (acro-osteolysis), skin degeneration (cutaneous atrophy), and partial lipodystrophy, a condition marked by selective loss of body fat (adipose tissue) from various areas of the body. Cutaneous atrophy and lipodystrophy may contribute to affected children having a prematurely-aged appearance (progeroid features). Lipodystrophy may be associated with clinical features of metabolic syndrome including insulin resistance, impaired glucose tolerance, and diabetes mellitus. Additional symptoms can occur as well. Two types of mandibuloacral dysplasia have been identified, type A and type B. Both types are inherited as autosomal recessive conditions. Mandibuloacral dysplasia type A (MADA) is caused by mutations of the lamin A/C (LMNA) gene; mandibuloacral dysplasia type B (MADB) is caused by mutations of the zinc metalloproteinase (ZMPSTE24) gene.
Mandibuloacral dysplasia may be classified as a form of lipodystrophy or progeria because of its overlapping symptoms. Mandibuloacral dysplasia type A may also be classified as a laminopathy, a general term for the group of disorders associated with a mutation of the LMNA gene. The ZMPSTE24 mutation that causes mandibuloacral dysplasia type B can also cause restrictive dermopathy syndrome.
American Diabetes Association
- 1701 N. Beauregard Street
- Alexandria, VA 22311
- Tel: (703)549-1500
- Fax: (703)549-6995
- Tel: (800)342-2383
- Email: askADA@diabetes.org
- Website: http://www.diabetes.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
- Website: http://rarediseases.info.nih.gov/GARD/
Progeria Research Foundation, Inc.
- P.O. Box 3453
- Peabody, MA 01961-3453
- Tel: (978)535-2594
- Fax: (978)535-5849
- Email: firstname.lastname@example.org
- Website: http://www.progeriaresearch.org
For a Complete Report
This is an abstract of a report from the National Organization for Rare Disorders (NORD). For a full-text version of this report, 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.
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.
Last Updated: 1/28/2013
Copyright 2013 National Organization for Rare Disorders, Inc.
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