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Definition
Cleidocranial dysostosis is an inherited disorder of bone development, characterized by absent or incompletely formed collar bones, abnormal shape of the skull with depression of the sagital suture, characteristic facial appearance, short stature, and dental abnormalities.Causes, incidence, and risk factors
Cleidocranial dysostosis is inherited as an autosomal dominant characteristic, which means that if one parent is affected, the children have a 50% chance of having the disease and any child who inherits the gene for the condition from the affected parent (regardless of the other parent's normal gene) will develop it.
The disorder is present from before birth (congenital) and equally common in males and females. People with cleidocranial dysostosis have a heavy protruding brow, a protruding jaw, and a wide nasal bridge. As these children mature, their adult teeth may come in late, but then they often develop an extra set of adult teeth, which causes their normal teeth to become misaligned.
The incomplete development or absence of the collar bones allows the shoulders to be brought together in front of the body. Other bone abnormalities exist. Intelligence is normal.
Symptoms
Signs and tests
There is often a family history of cleidocranial dysostosis.
Skeletal X-rays show:
Treatment
There is no specific treatment for the bony abnormalities. An oral surgeon should monitor teeth regularly, with particular attention to both decay and cosmetic appearance. An otologist should check for hearing defects.
Expectations (prognosis)
The bony abnormalities cause little problem. Appropriate dental care is vital.
Complications
The dental problems are the most significant complications.
Calling your health care provider
Call your health care provider if you have a family history of cleidocranial dysostosis, or already have a child with similar symptoms, and are planning to have a child.
Prevention
Genetic counseling is appropriate for prospective parents with a family history of cleidocranial dysostosis or in cases where one or both parents are affected.
Update Date: 12/27/2002 Updated by: Hebe Molmenti, M.D., Ph.D., Private Practice specializing in Plastic and Reconstructive Surgery, Baltimore, MD. Review provided by VeriMed Healthcare Network.
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Page last updated: 28 October 2004 |