National Organization for Rare Disorders, Inc.
It is possible that the main title of the report Hypophosphatasia 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.
Hypophosphatasia (HPP) is a rare genetic disorder characterized the abnormal development of bones and teeth. These abnormalities occur due to defective mineralization, the process by which bones and teeth take up minerals such as calcium and phosphorus. These minerals are required for proper hardness and strength. Defective mineralization results in bones that are soft and prone to fracture and deformity. Defective mineralization of teeth can lead to premature tooth loss. The specific symptoms can vary greatly from one person to another, sometimes even among members of the same family. There are five major clinical forms of HPP that range from an extremely severe form that can cause stillbirth to a form associated with only premature loss of baby (deciduous) teeth, but no bone abnormalities. Hypophosphatasia is caused by mutations in the tissue nonspecific alkaline phosphatase (ALPL) gene. This gene is also known as the TNSALP gene. Such mutations lead to low levels of the tissue nonspecific alkaline phosphatase enzyme. Depending on the specific form, hypophosphatasia can be inherited in an autosomal recessive or autosomal dominant manner.
CLIMB (Children Living with Inherited Metabolic Diseases)
- Climb Building
- 176 Nantwich Road
- Crewe, CW2 6BG
- United Kingdom
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European Skeletal Dysplasia Network
- Institute of Genetic Medicine
- Newcastle University
- Newcastle upon Tyne, NE1 3BZ
- United Kingdom
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Genetic and Rare Diseases (GARD) Information Center
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March of Dimes Birth Defects Foundation
- 1275 Mamaroneck Avenue
- White Plains, NY 10605
- Tel: (914)997-4488
- Fax: (914)997-4763
- Website: http://www.marchofdimes.com
NIH/National Institute of Arthritis and Musculoskeletal and Skin Diseases
- Information Clearinghouse
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- Email: NIAMSinfo@mail.nih.gov
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Soft Bones, Inc.
- 121 Hawkins Place
- Boonton, NJ 07005
- Tel: 201-317-1818
- Tel: 866-827-9937
- Email: firstname.lastname@example.org
- Website: http://www.softbones.org
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 www.rarediseases.org and click on Rare Disease Database under "Rare Disease Information".
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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 email@example.com
Last Updated: 12/12/1969
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