In almost half of patients, vitiligo starts before the age of 20 yr, and males and females are affected with approximately equal frequency ( Taïeb and Picardo, 2009). Vitiligo occurs worldwide with an estimated prevalence of 0.5–1% in most populations. Vitiligo, the most common hypopigmentary disorder, is an acquired disease characterized by progressive loss of melanocytes. Why an international consensus conference on vitiligo? Lastly, the conference agreed that ‘autoimmune vitiligo’ should not be used as a separate classification as published evidence indicates that the pathophysiology of all forms of vitiligo likely involves autoimmune or inflammatory mechanisms. The conference also endorsed the classification of KP for vitiligo as proposed by the VETF (history based, clinical observation based, or experimentally induced). Further, the conference recommends that disease stability be best assessed based on the stability of individual lesions rather than the overall stability of the disease as the latter is difficult to define precisely and reliably. A consensus emerged that segmental vitiligo be classified separately from all other forms of vitiligo and that the term ‘vitiligo’ be used as an umbrella term for all non-segmental forms of vitiligo, including ‘mixed vitiligo’ in which segmental and non-segmental vitiligo are combined and which is considered a subgroup of vitiligo. These topics were discussed in seven working groups representing different geographical regions. As suggested by an international panel of experts, the conference focused on four topics: classification and nomenclature definition of stable disease definition of Koebner’s phenomenon (KP) and ‘autoimmune vitiligo’. During the 2011 International Pigment Cell Conference (IPCC), the Vitiligo European Taskforce (VETF) convened a consensus conference on issues of global importance for vitiligo clinical research.
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