The typical vitiligo macule is chalk white in color, has convex margins (as if the white areas were flowing into normally pigmented skin), is 5mm to 5cm or more in diameter, and is round, oval, or elongated in shape. Linear or artifactual macules represent the isomorphic or “Koebner” phenomenon, following repeated trauma or pressure on the elbows, knees, and bony prominences. The disease progresses by gradual enlargement of individual macules and the development of new white spots on various parts of the body.
