Disorder turning anchor's skin from black to white

Detroit TV anchor talks openly, writes about his changing skin color

He has vitiligo, in which pigment-making cells are destroyed

White patches appear on different parts of the body

http://www.cnn.com/2007/HEALTH/conditions/12/18/turning.white.ap/index.html

Wikipedia article:
http://en.wikipedia.org/wiki/Vitiligo