US NATIONAL LIBRARY OF MEDICINE / SCIENCE PHOTO LIBRARY US NATIONAL LIBRARY OF MEDICINE / SCIENCE PHOTO LIBRARY
Alopecia areata (left) and leucoderma or leukoderma (right), historical medical illustration. Alopecia areata, or spot baldness, is usually due to an autoimmune attack on the hair follicles. The hair normally returns within a few months. Leucoderma, also called vitiligo, is a chronic skin condition that causes loss of pigment resulting in irregular patches of pale skin. From Atlas of Venereal and Skin Diseases by Prince Albert Morrow, published in 1889.
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