Hypophosphatemia, Familial

National Organization for Rare Disorders, Inc.

Important
It is possible that the main title of the report Hypophosphatemia, Familial 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.

Synonyms

  • Hypophosphatemic D-Resistant Rickets I
  • Hypophosphatemic D-Resistant Rickets II
  • Phosphate Diabetes
  • X-Linked Vitamin D-Resistant Rickets
  • Hereditary Type I Hypophosphatemia (HPDR I)
  • Hereditary Type II Hypophosphatemia (HPDR II)
  • X-Linked Hypophosphatemia (XLH)

Disorder Subdivisions

  • X-Linked Hypophosphatemic Rickets
  • Autosomal Dominant Hypophosphatemic Rickets (ADHR)
  • Autosomal Recessive Hypophosphatemic Rickets

General Discussion

Familial hypophosphatemia is a rare inherited disorder characterized by impaired transport of phosphate and altered vitamin-D metabolism in the kidneys. In addition, calcium and phosphate are not absorbed properly in the intestines, which can lead to softening of bones. Familial hypophosphatemia results in rickets, a childhood bone disease with characteristic growth plate abnormalities and progressive softening of the bone structure. In adults, the growth plate is not present so that the rickets primarily affects bone, a process generall called osteomalacia.

Major symptoms of familial hypophosphatemia include skeletal malformations, bone pain, and abnormally bowed legs. Affected infants often fail to grow at the expected rate, potentially resulting in short stature. Familial hypophosphatemia is most often inherited as an X-linked trait. However, autosomal dominant and recessive forms of familial hypophosphatemia have been reported in the medical literature.

Resources

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
Email: Askus@marchofdimes.com
Internet: http://www.marchofdimes.com

NIH/National Digestive Diseases Information Clearinghouse
2 Information Way
Bethesda, MD 20892-3570
Tel: (301)654-3810
Fax: (301)907-8906
Tel: (800)891-5389
Email: nddic@info.niddk.nih.gov
Internet: http://www.niddk.nih.gov

XLH Network Inc.
4562 Stoneledge Lane
Manlius, NY 13104
Tel: (315)682-2659
Email: info@xlhnetwork.org
Internet: http://www.xlhnetwork.org

MUMS National Parent-to-Parent Network
150 Custer Court
Green Bay, WI 54301-1243
USA
Tel: (920)336-5333
Fax: (920)339-0995
Tel: (877)336-5333
Email: mums@netnet.net
Internet: http://www.netnet.net/mums/

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
Email: ordr@od.nih.gov
Internet: http://rarediseases.info.nih.gov/Default.aspx

Madisons Foundation
PO Box 241956
Los Angeles, CA 90024
Tel: (310)264-0826
Fax: (310)264-4766
Email: getinfo@madisonsfoundation.org
Internet: http://www.madisonsfoundation.org

For a Complete Report

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

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