Diseases & Conditions


A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Laron Syndrome


Synonyms of Laron Syndrome
  • GHBP
  • GHR
  • Growth Hormone Binding Protein Deficiency or Dysfunction
  • Growth Hormone Receptor Deficiency or Dysfunction
  • Laron Dwarfism
  • Laron Type Pituitary Dwarfism I
  • LTD1
  • Pituitary Dwarfism II

Disorder Subdivisions



    General Discussion
    Laron syndrome type I (LTD1) a rare genetic disorder, is caused by the body's inability to use the growth hormone (GH) that it produces. The problem lies not in the production of growth hormone but rather in a defective GH-receptor gene. This defect prevents the proper binding of the GH molecule, leaving high levels of unbound growth hormone in the plasma.

    Laron syndrome is characterized by short stature and delayed bone age, as well as high levels of circulating growth hormone.

    A second form of the disorder known as Laron syndrome type II (LTD2) shows typical clinical features of the Laron syndrome but is due to a defect in the biochemical processing of growth hormone after the hormone has been bound on the cell surface.

    Organizations related to Laron Syndrome
    • Human Growth Foundation
      997 Glen Cove Avenue
      Glen Head NY 11545
      Phone #: 516-671-4041
      800 #: 800-451-6434
      e-mail: hgf1@hgfound.org
      Home page: http://www.hgfound.org/
    • Little People of America, Inc.
      250 El Camino Real
      Tustin CA 92780
      Phone #: 714-368-3689
      800 #: 888-572-2001
      e-mail: info@lpaonline.org
      Home page: http://www.lpaonline.org
    • Little People's Research Fund, Inc.
      616 Old Edmondson Avenue
      Catonsville MD 21228-3305
      Phone #: 410-747-1100
      800 #: 800-232-5773
      e-mail: lprf@lprf.org
      Home page: http://www.lprf.org
    • MAGIC Foundation for Children's Growth
      6645 W. North Avenue
      Oak Park IL 60302
      Phone #: 708-383-0808
      800 #: 800-362-4423
      e-mail: mary@magicfoundation.org
      Home page: http://www.magicfoundation.org
    • MUMS (Mothers United for Moral Support, Inc) National Parent-to-Parent Network
      150 Custer Court
      Green Bay WI 54301-1243
      Phone #: 920-336-5333
      800 #: 877-336-5333
      e-mail: mums@netnet.net
      Home page: http://www.netnet.net/mums/



    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