JDD alert: Must-read study reports an association between lichen planopilaris and scalp non-melanoma skin cancer
A new JDD report analyzes global TriNetX data from 2005 to 2025 and compares patients with lichen planopilaris, androgenetic alopecia, and alopecia areata to matched controls. The authors observed that patients with lichen planopilaris had higher odds of subsequent non-melanoma skin cancers on the scalp and neck, with roughly twofold increased odds for both basal cell carcinoma and squamous cell carcinoma. The alopecia areata and androgenetic alopecia cohorts did not show the same pattern.
The study is retrospective and relies on administrative coding, including a combined scalp and neck category that limits anatomic precision. Key confounders such as sun exposure, frequency of dermatology visits, specific therapies, and Fitzpatrick skin type were not available in the dataset. These factors, along with the observational design, mean the findings describe an association and do not establish causation.
For dermatologists and dermatology HCPs, the report raises a diagnostic and surveillance consideration: greater vigilance for scalp malignancy in patients with lichen planopilaris may be warranted.
Read the full JDD article for cohort definitions, analytic methods, and detailed tables to inform clinical interpretation and future research directions.
Blog write-up assisted by AI
