Ectodermal dysplasias is a group of conditions in which there is abnormal development of the skin, hair, nails, teeth, or sweat glands.

Causes

There are many different types of ectodermal dysplasias. Each type of dysplasia is caused by specific mutations in certain genes. Dysplasia means abnormal development of cells or tissues. The most common form of ectodermal dysplasia usually affects men. Other forms of the disease affect men and women equally.

Symptoms

People with ectodermal dysplasia have a lack of sweat glands. This means they may not sweat or sweat less than normal.

In children with the disease, their bodies may have a problem controlling fevers. When the skin cannot sweat, it is hard for the body to control temperature properly. So even a mild illness can cause a very high fever.

Adults with the disease can't tolerate a warm environment. Air conditioning and other measures are needed to keep a normal body temperature.

Depending on which genes are affected, other symptoms may include:

• Abnormal nails
• Abnormal or missing teeth, or fewer than normal number of teeth
• Cleft lip
• Decreased skin color (pigment)
• Large forehead
• Low nasal bridge
• Thin, sparse hair
• Learning disabilities
• Poor hearing
• Poor vision with decreased tear production
• Weakened immune system

Exams and Tests

Tests that may be done include:

• Biopsy of the mucous membranes

  Biopsy

  A biopsy is the removal of a small piece of tissue for laboratory examination.

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  Mucous membranes

  Mucosa is moist tissue that lines certain parts of the inside of your body. It is in your: NoseMouthLungsDigestive tractUrinary and genital tracts G...

  

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• Biopsy of the skin

  Biopsy of the skin

  A skin lesion biopsy is when a small amount of skin is removed so it can be examined under a microscope. The skin is tested to look for skin conditi...

  

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• Genetic testing (available for some types of this disorder)
• X-rays of the teeth or bones may be done

Treatment

There is no specific treatment for this disorder. Instead, symptoms are treated as needed.

Things you can do may include:

• Wear a wig and dentures to feel more comfortable about appearance.
• Use artificial tears to prevent dry eyes.
• Use saline nose spray to remove debris and prevent infection.
• Take cooling water baths or use water sprays to keep a normal body temperature. Water evaporating from the skin replaces the cooling function of sweat evaporating from the skin.

Support Groups

These resources can provide more information on ectodermal dysplasias:

• National Foundation for Ectodermal Dysplasias -- www.nfed.org
• NIH Genetic and Rare Diseases Information Center -- rarediseases.info.nih.gov/diseases/6317/ectodermal-dysplasia

Outlook (Prognosis)

If you have a common variant of ectodermal dysplasia, this will not shorten your lifespan. However, you may need to pay attention to temperature changes and other problems associated with this condition.

Possible Complications

If untreated, health problems from this condition may include:

• Brain damage caused by increased body temperature
• Seizures caused by high fever (febrile seizures)

  Febrile seizures

  A febrile seizure is a convulsion in a child triggered by a fever.

  

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When to Contact a Medical Professional

Contact your health care provider if your child shows symptoms of this disorder.

Prevention

If you have a family history of ectodermal dysplasia, and you are planning to have children, genetic counseling is recommended. Often, it is possible to diagnose ectodermal dysplasia while the baby is still in the womb.

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