Concurrence of alopecia areata and vitiligo at the same anatomical site.

Both alopecia areata and vitiligo are common skin disorders that are considered to be caused by an autoimmune response targeted to hair follicle and melanocyte antigens, respectively. The association of these two diseases in the same patient is well known, however, coexistence of alopecia areata and vitiligo within the same lesion is very rare. Herein, we report an 8-year-old boy who had colocalization of alopecia areata and vitiligo on the frontal portion of his scalp.