DR P. MARAZZI / SCIENCE PHOTO LIBRARY DR P. MARAZZI / SCIENCE PHOTO LIBRARY
Hair loss. Close-up of the scalp of a 20-year-old male patient with spot baldness, or alopecia areata. Alopecia is characterised by hair loss. Alopecia areata is usually due to an autoimmune attack on the hair follicles and the hair normally returns within a few months.
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