a condition of undetermined etiology characterized by circumscribed, nonscarring, usually asymmetrical areas of baldness on the scalp, eyebrows, and bearded portion of the face. Hairy skin anywhere on the body may be affected; occasionally follows an autosomal dominant inheritance. Slow enlargement but eventual regrowth within one year is common, but relapse is frequent and progression to alopecia totalis may occur, especially with childhood onset.