Closing the Gap Between HIV Testing Guidelines and Dermatology: A Narrative Review of Missed Opportunities in Indicator Condition-Guided Testing

Background/Objectives: Early diagnosis of HIV remains a key objective of global health strategies; however, nearly half of HIV infections in Europe (47.0%) continue to be diagnosed at a late stage. Individuals with undiagnosed HIV infection frequently present initially to dermatology services with inflammatory or pruritic dermatoses. Indicator condition-guided (IC-guided) HIV testing has been reaffirmed by recent guidelines as a central pillar of differentiated testing services, with explicit recommendations to systematically offer testing when defined conditions are present. Methods: This narrative review compares current HIV testing and IC-guided testing recommendations with major dermatology guidelines. Results: This comparison highlights a persistent misalignment. Although certain conditions, such as herpes zoster in younger adults, crusted scabies and selected forms of chronic pruritus, carry clear recommendations to offer HIV testing, most dermatology guidelines for chronic inflammatory dermatoses do not include HIV testing as part of routine assessment. Observational data and implementation studies indicate that integrating IC-guided testing into dermatology pathways can identify previously undiagnosed HIV infections, often in patients without recognised risk factors. Conclusions: Our observations highlight the need to integrate HIV testing recommendations into dermatology clinical guidelines. Aligning these guidelines with IC-guided testing strategies is not only feasible but can also reduce late HIV diagnoses arising from dermatology services.