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Diseases

Genetic and Rare Diseases Information Center (GARD)

Pseudohypoparathyroidism type 1A


Other Names for this Disease
  • PHP1A
  • Albright hereditary osteodystrophy with multiple hormone resistance
Related Diseases
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Overview

Pseudohypoparathyroidism type 1A is a type of pseudohypoparathyroidism. Pseudohypoparathyroidism is when your body is unable to respond to parathyroid hormone, which is a hormone that controls the levels of calcium, phosphorous, and vitamin D in the blood. The symptoms are very similar to hypoparathyroidism (when parathyroid hormone levels are too low). The main symptoms are low calcium levels and high phosphate levels in the blood. This results in cataracts, dental problems, seizures, numbness, and tetany (muscle twitches and hand and foot spasms). Symptoms are generally first seen in childhood. People with this disorder are also resistant to other hormones, such as thyroid-stimulating hormone and gonadotropins. Type 1A is also associated with a group of symptoms referred to as Albright's hereditary osteodystrophy, which includes short stature, a round face, obesity, and short hand bones. Pseudohypoparathyroidism type 1A is caused by a spelling mistake (mutation) in the GNAS gene and is inherited in an autosomal dominant manner.[1][2]


Last updated: 1/7/2016

References

  1. Topiwala S. Pseudohypoparathyroidism. MedlinePlus. July 2012; http://www.nlm.nih.gov/medlineplus/ency/article/000364.htm. Accessed 10/17/2012.
  2. Pseudohypoparathyroidism type 1A. Online Mendelian Inheritance of Man (OMIM). June 2010; http://omim.org/entry/103580. Accessed 10/7/2011.
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Basic Information

  • MedlinePlus was designed by the National Library of Medicine to help you research your health questions, and it provides more information about this topic.
  • The National Organization for Rare Disorders (NORD) has a report for patients and families about this condition. NORD is a patient advocacy organization for individuals with rare diseases and the organizations that serve them.

In Depth Information

  • Medscape Reference provides information on this topic. You may need to register to view the medical textbook, but registration is free.
  • The Monarch Initiative brings together data about this condition from humans and other species to help physicians and biomedical researchers. Monarch’s tools are designed to make it easier to compare the signs and symptoms (phenotypes) of different diseases and discover common features. This initiative is a collaboration between several academic institutions across the world and is funded by the National Institutes of Health. Visit the website to explore the biology of this condition.
  • Online Mendelian Inheritance in Man (OMIM) is a catalog of human genes and genetic disorders. Each entry has a summary of related medical articles. It is meant for health care professionals and researchers. OMIM is maintained by Johns Hopkins University School of Medicine. 
  • Orphanet is a European reference portal for information on rare diseases and orphan drugs. Access to this database is free of charge.
  • PubMed is a searchable database of medical literature and lists journal articles that discuss Pseudohypoparathyroidism type 1A. Click on the link to view a sample search on this topic.

Selected Full-Text Journal Articles

Other Names for this Disease
  • PHP1A
  • Albright hereditary osteodystrophy with multiple hormone resistance
Related Diseases
See Disclaimer regarding information on this site. Some links on this page may take you to organizations outside of the National Institutes of Health.