Prevalence and incidence of primary lymphocytic cicatricial alopecias in the United States from 2019 to 2024

This document discusses the prevalence and incidence of primary lymphocytic cicatricial alopecias (PLCAs) in the United States from 2019 to 2024. PLCAs, which include central centrifugal cicatricial alopecia (CCCA), frontal fibrosing alopecia (FFA), and lichen planopilaris (LPP), are chronic inflammatory disorders that lead to permanent hair loss due to follicular destruction. The study highlights the importance of timely diagnosis to preserve hair and addresses the lack of comprehensive US prevalence data, which has been limited due to the recent introduction of subtype-specific ICD-10 codes in October 2024. The document underscores the significant psychosocial impact of these conditions.