Disorders of the Skin - Vitiligo
The condition called vitiligo stems from a loss of pigment in sharply defined areas of the skin. There is no known cause for this abnormality of melanin distribution. It may affect any part of the body and may appear any time up to middle age. It is particularly conspicuous when it occurs among blacks, or when a lighter skinned person becomes tanned except around the paler patches. There is no cure for vitiligo, but cosmetic treatment with pastes and lotions can diminish the contrast between affected areas and the rest of the skin.