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Can test for pregnancies at 50% risk (at least one parent has Waardenburg's Syndrome)

performed on fetal cells obtained by CVS

can determine whether or not the disease is present but not the severity through testing

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"Genetics of Auditory Disorders." Genetics of Auditory Disorders. N.p., n.d. Web. 17 Feb. 2016.
Handbook of Genetic Counseling/Waardenburg Syndrome." - Wikibooks, Open Books for an Open World. N.p., n.d.       Web. 17 Feb. 2016.
Hansen, Axel C., George Ackaouy, and E. Perry Crump. “Waardenburg’s Syndrome: Report of a Pedigree .” Journal          of the National Medical Association57.1 (1965): 8–12. Print.
Sanjati, Stef. "My Face: Waardenburg Syndrome." YouTube. YouTube, 1 Feb. 2015. Web. 16 Feb. 2016.
"Waardenburg Syndrome." Genetics Home Reference. N.p., 8 Feb. 2016. Web. 16 Feb. 2016. Website.
"Waardenburg Syndrome - NORD (National Organization for Rare Disorders)." NORD (National Organization for              Rare Disorders). N.p., n.d. Web. 17 Feb. 2016.

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It varies from person to person, but generally it doesn't affect too much of the person's life. Relief of constipation is important and can be treated. A child might have to learn sign language if they are fully deaf. Otherwise, the child can function as  as any other child.

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An example of a pedigree with Waardenburg syndrome.

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It affects about 1 in 40,000 people. Types I and II are the most common, whereas types III and IV are rare

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Individuals affected with Waardenburg syndrome have a normal life expectancy.

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There is no specific treatment although their are ways to relieve the constipation symptom.

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White patch or strip of hair

Difficulty completely straightening joints

Extremely pale blue eyes or eye colors that don't match

Full or Partial Deafness

Constipation

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The EDN3 gene is located on the long arm of chromosome 20

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It is usually in an autosomal dominant pattern, but can be in an autosomal recessive pattern. Usually at least one parent has this disorder.

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Klein-Waardenburg syndrome;Waardenburg-Shah syndrome