Primary cicatricial alopecias.

Primary cicatricial alopecias refer to a group of rare, idiopathic, inflammatory scalp disorders that result in permanent hair loss. Primary cicatricial alopecias comprise a diverse group of inflammatory diseases and can be classified via different approaches, such as clinical presentation, histopathologic findings, or both. Primary cicatricial alopecias are rare scalp disorders. Whiting found a prevalence of 7.3% in all patients who sought advice for hair and scalp problems at the Baylor Hair Research and Treatment Center in Dallas between 1989 and 1999.