Treatment of alopecia areata with diphencyprone

26 patients with alopecia areata were treated topically with diphencyprone. 10 had alopecia universalis, 7 alopecia totalis and 9 had alopecia areata. The treatment lasted from 4 to 14 months. In 13 patients a little response was obtained; only in 1 case it was satisfactory. Factors that appear to influence these results are discussed.