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Definition:

Cri du chat syndrome is a group of symptoms that result from missing a piece of chromosome number 5. The syndrome’s name is based on the infant’s cry, which is high-pitched and sounds like a cat.



Alternative Names:

Chromosome 5p deletion syndrome; 5p minus syndrome; Cat cry syndrome



Causes, incidence, and risk factors:

Cri du chat syndrome is rare. It occurs when a piece of information on chromosome 5 is missing. It is likely that multiple genes on chromosome 5 are deleted. One deleted gene, called TERT (telomerase reverse transcriptase) is involved in control of cell growth, and may play a role in how some of the features of this syndrome develop.

Most cases are believed occur during the development of an egg or sperm. A minority of cases result from one parent carrying a rearrangement of chromosome 5 called a translocation.

Between 1 in 20,000 - 50,000 babies are affected. This disease may account for up to 1% of individuals with severe mental retardation.



Symptoms:

Signs and tests:

In addition to symptoms, the physical examination may show:

Genetic tests can show a missing part of chromosome 5. Skull x-ray may reveal an abnormal angle to the base of the skull.



Treatment:

No specific treatment is available for this syndrome. The mental retardation must be addressed, and counseling is recommended for the parents.

Parents of a child with this syndrome should have genetic counseling and a karyotype test to determine if one parent has a rearrangement of chromosome 5.



Support Groups:

5p- Society -- www.fivepminus.org



Expectations (prognosis):

The outcome varies but mental retardation is usual. Half of those children affected learn sufficient verbal skills to communicate. The cat-like cry becomes less apparent over time.



Complications:

Complications depend on the extent of mental retardation and physical abnormalities. Complications may include:

  • Inability to care for self
  • Inability to function in society


Calling your health care provider:

This is a diagnosis that is generally made in the hospital at birth. Your health care provider will discuss the findings with you. On discharge, it's important to maintain regular contact with your health care provider and other caregivers. Genetic counseling and testing is recommended for all persons with a family history of this syndrome.



Prevention:

There is no known prevention. Couples with a family history of this syndrome who wish to become pregnant may consider genetic counseling.




Review Date: 7/1/2007
Reviewed By: Brian Kirmse, MD, Mount Sinai School of Medicine, Department of HumanGenetics, New York, NY. Review provided by VeriMed Healthcare Network.

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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789 Central Avenue, Dover, NH 03820
Phone: (603) 742-5252
Toll free: 1 (877) 201-7100