[Therapy of alopecia areata with diphenylcyclopropenone].

With special regard to practical aspects, we discuss the treatment of alopecia areata by topical immunotherapy with diphenylcyclopropenone. Out of 27 patients treated this way, 10 patients showed good and cosmetically acceptable regrowth of terminal hair; 11 patients showed some regrowth, which was not satisfactory, however, for cosmetic reasons; 6 patients developed no hair growth at all. The complete failure of treatment in the latter cases may possibly be due to the long duration of the alopecia.