CD1A and vitiligo: Fluorescence immunohistochemistry staining with anti-CD1a antibodies (shown in green) of samples from progressive vitiligo, progressive RDIL, and normal skin revealed that LCs in the epidermis of both progressive vitiligo and RDIL are greatly increased relative to normal skin, and that these cells are large and polygonal in shape, with more dendrites/branches and longer dendrites, compared with healthy controls (Figure 2a).