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Definition:

Achondrogenesis is a rare type of growth hormone deficiency in which there is a defect in the development of bone and cartilage.



Causes, incidence, and risk factors:

Achondrogenesis is inherited, which means it is passed down through families.

Some types are known to be recessive, meaning both parents carry the defective gene and the chance for a subsequent child to be affected is about 25%.



Symptoms:
  • Very short trunk, arms, legs and neck
  • Head appears large in relation to the trunk
  • Small lower jaw
  • Narrow chest


Signs and tests:

X-rays show bone problems associated with the condition.



Treatment:

There is no current therapy. Talk to your doctor about care decisions.

Genetic counseling may be appropriate.



Support Groups:



Expectations (prognosis):

The outcome is generally very poor. Many infants with achondrogenesis are stillborn or die shortly after birth because of breathing problems related to the abnormally small chest.



Complications:

This condition is often fatal early in life.



Calling your health care provider:

This condition is often diagnosed on the first examination of an infant.



Prevention:




Review Date: 8/2/2009
Reviewed By: Neil K. Kaneshiro, MD, MHA, Clinical Assistant Professor of Pediatrics, University of Washington School of Medicine. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.

The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. A licensed medical professional should be consulted for diagnosis and treatment of any and all medical conditions. Call 911 for all medical emergencies. Links to other sites are provided for information only -- they do not constitute endorsements of those other sites. © 1997- A.D.A.M., Inc. Any duplication or distribution of the information contained herein is strictly prohibited.
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Wentworth-Douglass Hospital
789 Central Avenue, Dover, NH 03820
Phone: (603) 742-5252
Toll free: 1 (877) 201-7100