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| Waardenburg's Syndrome Klein-Waardenburg Syndrome | Klein' | s Syndrome | Waardenburg-Klein Syndrome | Klein Syndrome | Klein Waardenburg Syndrome | Kleins Syndrome | Syndrome, Klein' | s | Syndrome, Klein-Waardenburg | Syndrome, Waardenburg' | s Rare, autosomal dominant disease with variable penetrance and several known clinical types. Characteristics may include depigmentation of the hair and skin, congenital deafness, heterochromia iridis, medial eyebrow hyperplasia, hypertrophy of the nasal root, and especially dystopia canthorum. The underlying cause may be defective development of the neural crest (neurocristopathy). Waardenburg's syndrome may be closely related to piebaldism. Klein-Waardenburg Syndrome refers to a disorder that also includes upper limb abnormalities. |