In 1965, Ikeda1 proposed the following clinical classifications of alopecia areata (AA): "common AA," "atopic," "prehypertensive," and "mixed" or "combined" types. In 1995, Colombe and colleagues2 defined 2 clinical-evolutive types of AA: long-standing patchy AA and long-standing alopecia totalis and alopecia universalis, by genetic studies.
García-Hernández MJ, Rodríguez-Pichardo A, Camacho F. Multivariate Analysis in Alopecia Areata: Risk Factors and Validity of Clinical Forms. Arch Dermatol. 1999;135(8):998–999. doi:10-1001/pubs.Arch Dermatol.-ISSN-0003-987x-135-8-dlt0899
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