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The clinical significance of AK is related to its potential for malignant transformation and progression to squamous cell carcinoma (SCC). Accurate diagnosis of AK is essential for adequate treatment, evaluation of therapeutic efficacy, and mitigating the risk of developing SCC. However, clinician variability due to the subjective nature of current diagnostic tools presents significant challenges to achieving consistent and reliable AK diagnoses. Thus, there is no universally accepted standard for measuring AK.<\/jats:p><jats:p>This review evaluates current methods for evaluating and diagnosing AK, focusing on clinician variability through inter- and intraobserver agreement. Eight peer-reviewed studies investigating the reliability of various approaches for AK evaluation show substantial variability in interobserver or intraobserver agreement, with most methods demonstrating only slight to moderate reliability. Some suggest that consensus discussions and simplified rating scales can modestly improve diagnostic reliability. However, remaining variability and the lack of a universally accepted standard for measuring AK underscore the need for more robust and standardized diagnostic and evaluation methods.<\/jats:p><jats:p>The review emphasizes the need for improved diagnostic tools and standardized methods to enhance the accuracy and reliability of AK assessments. It also proposes applying a novel examination approach using 1,3-dihydroxyacetone (DHA) staining which may improve the visualization and identification of AK lesions. Advancements in these areas have significant potential, promising better clinical practices and patient outcomes in AK management.<\/jats:p>","DOI":"10.1007\/s00403-024-03305-5","type":"journal-article","created":{"date-parts":[[2024,8,20]],"date-time":"2024-08-20T11:02:23Z","timestamp":1724151743000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":5,"title":["Actinic keratosis metrics"],"prefix":"10.1007","volume":"316","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-8406-193X","authenticated-orcid":false,"given":"Sarah E.","family":"Burstein","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6762-4016","authenticated-orcid":false,"given":"Howard","family":"Maibach","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"297","published-online":{"date-parts":[[2024,8,20]]},"reference":[{"issue":"4","key":"3305_CR1","doi-asserted-by":"publisher","first-page":"650","DOI":"10.1016\/s0190-9622(97)70265-2","volume":"36","author":"JP Callen","year":"1997","unstructured":"Callen JP, Bickers DR, Moy RL (1997) Actinic keratoses. 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