Dermatology AdvisorTNF-I Exposure for Inflammatory Diseases May Increase Skin Cancer Risk

ℹ️ Observational Association Only Evidence

A 56,209-patient retrospective cohort published in JAAD found TNF-I exposure nearly doubled the risk of any skin cancer in chronic inflammatory disease patients. Adjusted hazard ratios reached 1.99 for BCC, 1.69 for SCC, and 1.54 for melanoma.

Clinical Considerations

• TNF-I exposure was associated with elevated risk across all skin cancer subtypes in adjusted analyses, with BCC showing the strongest association
• Older age, White race, men, and Crohn disease independently increased risk across all skin cancer types
• Most melanomas at diagnosis were in situ or stage I in both groups (88% vs 89%), suggesting no excess in high-risk features
• Sun exposure, Fitzpatrick skin type, and dysplastic nevi history were not captured, leaving meaningful residual confounding

Practice Applications

• Consider baseline skin cancer screening before initiating TNF-I therapy in patients with additional risk factors
• Recognize Crohn disease patients on TNF-I as warranting heightened dermatologic surveillance
• Integrate annual full-body skin examination into long-term TNF-I monitoring for higher-risk patients
• Interpret the association as hypothesis-generating given uncontrolled UV and skin-type confounders

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