Vitiligo is a relatively common, acquired pigmentary
disorder characterized by areas of depigmented skin resulting from loss of
epidermal melanocytes. The prevalence of this disease varies from 0.1% to
2% in various global populations. Onset may occur at any age, but the incidence
usually peaks in the second and third decades of life. Patterns of distribution
of the disease include the generalized, acral or acrofacial, localized, and
segmental types. The generalized distribution is the most common pattern and
is characterized by symmetrically distributed areas of depigmentation. Segmental
vitiligo is the least common pattern and occurs in a dermatomal or quasi-dermatomal
distribution, often following the distribution of the trigeminal nerve. The
course of the disease is unpredictable. Vitiliginous skin lesions may remain
stable or slowly progress for years. In some instances, however, patients
undergo rapid, complete depigmentation in 1 or 2 years.
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Immunohistochemical staining for melanocytes using an alkaline phosphatase
detection kit and a 1:5 dilution of MEL-5 antibody after predigestion for
4 minutes with protease. A, vitiliginous skin; B, healthy skin with scattered
cells in the basal layer positive to MEL-5 antibody (red chromogen) (magnification ×20).
A, Patient with more than 20% cutaneous surface depigmentation at baseline.
B, The same patient with extensive areas of repigmentation after receiving
47 narrowband UV-B treatments.
Country-Specific Mortality and Growth Failure in Infancy and Yound Children and
Association With Material Stature
Use interactive graphics and maps to view and sort country-specific infant and early
dhildhood mortality and growth failure data and their association with maternal
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