de·pig·men·ta·tion (d -p g m n-t  shn, -m n-)n. The loss or removal of normal pigmentation. |
depigmentation.
See dyspigmentation.
depigmentation
removal of pigment; usually refers to melanin. See also hypopigmentation.
nasal depigmentation
occurs in dogs with a normal, darkly pigmented nasal planum at birth which later fades to brown or a pale gray-white. Called also Dudley nose, the cause is unknown, but it may be a form of vitiligo. A seasonal loss of pigmentation, usually during winter months, occurs in some breeds, including Siberian huskies, Golden retrievers, Labrador retrievers and Bernese mountain dogs. Called also snow nose. 
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Depigmentation (Dudley Nose).
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