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Diseases

Genetic and Rare Diseases Information Center (GARD)

Testotoxicosis


Other Names for this Disease
  • Familial gonadotropin-independent male-limited sexual precocity
  • Familial male-limited precocious puberty
  • Familial Testotoxicosis (subtype)
  • FMPP
  • Male-limited precocious puberty
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Overview

Testotoxicosis is a form of gonadotropin-independent precocious puberty in which boys experience early onset and progression of puberty. The disease generally presents between 2 and 4 years of age. Patients have accelerated growth, early development of secondary sexual characteristics and reduced adult height. Testotoxicosis is caused by an activating mutation of the luteinizing hormone receptor (LHCGR) gene, which leads to increased levels of sex steroids in the context of low luteinizing hormone. The condition may be sporadic or transmitted as a dominant trait. It is only expressed in males.[1][2][3][4] Treatment consists of reducing hyperandrogenism in children (sexual maturation, stature), with ketoconazole or a combination of antiandrogens and aromatase inhibitors.[4]
Last updated: 2/29/2012

References

  1. Reiter EO, Norjavaara E.. Testotoxicosis: current viewpoint. Pediatr Endocrinol Rev. 2005; http://www.ncbi.nlm.nih.gov/pubmed?term=16361981. Accessed 2/29/2012.
  2. Brito VN, Latronico AC, Arnhold IJ, Mendonca BB. Update on the etiology, diagnosis and therapeutic management of sexual precocity. Arq Bras Endocrinol Metabol. 2008; http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0004-27302008000100005&lng=en&nrm=iso&tlng=en. Accessed 2/29/2012.
  3. Ferry RJ, Fenton CL, Poth MPM. Precocious Pseudopuberty. eMedicine. 2009; http://emedicine.medscape.com/article/923876-overview. Accessed 2/29/2012.
  4. Carel JC. Testotoxicosis. Orphanet. 2005; http://www.orpha.net/consor/cgi-bin/OC_Exp.php?lng=EN&Expert=3000. Accessed 2/29/2012.
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Basic Information

In Depth Information

  • Medscape Reference provides information on this topic. You may need to register to view the medical textbook, but registration is free.
  • 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 Testotoxicosis. Click on the link to view a sample search on this topic.
Other Names for this Disease
  • Familial gonadotropin-independent male-limited sexual precocity
  • Familial male-limited precocious puberty
  • Familial Testotoxicosis (subtype)
  • FMPP
  • Male-limited precocious puberty
See Disclaimer regarding information on this site. Some links on this page may take you to organizations outside of the National Institutes of Health.