COMPARATIVE STUDY
JOURNAL ARTICLE
RESEARCH SUPPORT, NON-U.S. GOV'T
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Autosomal dominant inheritance of central centrifugal cicatricial alopecia in black South Africans.

BACKGROUND: Central centrifugal cicatricial alopecia (CCCA) is the commonest type of primary scarring alopecia in women of African descent. Little is currently known about the disease genetics.

OBJECTIVE: We sought to investigate patterns of inheritance in CCCA and ascertain the contribution of nongenetic factors such as hair-grooming habits to the pathogenesis of the disease.

METHODS: Affected individuals with at least 1 available family member were recruited from 2005 through 2012 inclusive for pedigree analysis. CCCA was diagnosed on clinical and histopathological grounds.

RESULTS: Fourteen index African families with 31 immediate family members participated in the initial screening. The female to male ratio was 29:2 with an average age of 50.4 years. All patients displayed histologic features typical for CCCA. Pedigree analysis suggested an autosomal dominant mode of inheritance. Hair-grooming habits were found to markedly influence disease expression.

LIMITATIONS: Small number of patients is a limitation.

CONCLUSION: CCCA can be inherited in an autosomal dominant fashion, with partial penetrance and a strong modifying effect of hairstyling and gender.

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