Cicatricial alopecias (CA) is a term for a group of subtypes of hair loss in which the hair follicle is destroyed by an unknown inflammatory mechanism. 1,2 Clinically, CA results in loss of the follicular ostia. 1,3 There are three main groups of CA that are grouped based on the perifollicular inflammatory response: primary neutrophilic, primary lymphocytic, or mixed subtypes. 2 Table 1 displays the inflammatory category in which each subtype belongs. The goal of treatment is to stop the ongoing inflammation through a combination of topical or intralesional corticosteroids, antimalarials, immunosuppressants, and antimicrobials, although a number of other medications, lasers, and other therapies have been trialed in refractory cases. 4 Alopecia can have profound psychosocial ramifications and negatively affect a patient's quality of life and self-esteem. 5,6 Even with treatment, patients usually do not experience hair regrowth. 4 Thus, it is important to counsel patients that the goal of treatment is to stop the ongoing inflammation and prevent further hair loss. This conversation must be undertaken delicately as this can be an incredibly difficult conversion for the patient. However, there have been reports in the literature of hair regrowth following treatment of CA. Thus, the aim of this review is to describe the cases of hair regrowth in CA in the published literature.
| ME THODSA primary literature search was completed in August 2020 using the keywords "regrowth", "growth", and "name of each subtype of cicatricial alopecia" (e.g., "frontal fibrosing alopecia" or "lichen planopilaris").The databases searched included: PubMed, Cochrane, and Google Scholar. The subtypes of CA that were included in this search were: lichen planopilaris (LPP), frontal fibrosing alopecia (FFA), Graham-Little Syndrome (GLS), central centrifugal CA (CCCA), discoid lupus erythematous (DLE), follicular mucinosis (FM), keratosis follicularis spinulosa decalvans (KFSD), pseudopelade of Brocq, dissecting cellulitis of the scalp (DCS), folliculitis decalvans (FD), acne keloidalis (AK), acne necrotica (AN), and erosive pustular dermatosis of the scalp (EPDS).Eligibility was determined upon review of the article to determine whether they reported documented, either written or photographed, report of hair regrowth. References from each study were assessed to determine if any fit inclusion criteria. Only studies published in English were included.