Review
Tumor necrosis factor-α inhibitor-induced psoriasis: Systematic review of clinical features, histopathological findings, and management experience

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Background

Tumor necrosis factor-α (TNF-α) inhibitors have been reported to induce new-onset psoriasis.

Objective

To better define the demographic, clinical features, and treatment approach of TNF-α inhibitor-induced psoriasis.

Methods

Systematic review of published cases of TNF-α inhibitor-induced psoriasis.

Results

We identified 88 articles with 216 cases of new-onset TNF-α inhibitor-induced psoriasis. The mean age at psoriasis onset was 38.5 years. The most common underlying diseases were Crohn disease (40.7%) and rheumatoid arthritis (37.0%). Patients underwent TNF-α therapy for an average of 14.0 months before psoriasis onset with 69.9% of patients experiencing onset within the first year. The majority of patients received skin-directed therapy, though patients who discontinued TNF therapy had the greatest resolution of symptoms (47.7%) compared with those who switched to a different TNF agent (36.7%) or continued therapy (32.9%).

Limitations

Retrospective review that relies on case reports and series.

Conclusion

While TNF-α inhibitor cessation may result in resolution of induced psoriasis, lesions may persist. Decisions regarding treatment should be weighed against the treatability of TNF-α inhibitor-induced psoriasis, the severity of the background rheumatologic or gastrointestinal disease, and possible loss of efficacy with cessation followed by retreatment. Skin-directed therapy is a reasonable initial strategy except in severe cases.

Section snippets

Methods

We conducted an electronic literature search to identify studies, case reports, and case series that documented new-onset psoriasiform lesions in patients being treated with a TNF-α inhibitor (Fig 1).

Clinical and histopathologic characteristics

Of the 190 full-text articles assessed for eligibility, 88 articles met inclusion criteria for the final analysis. We extracted a total of 216 cases of new-onset TNF-α inhibitor-induced psoriasis from these publications. Demographic features of patients with TNF-α inhibitor-induced psoriasis are summarized in Table I.

Women comprised 72.2% of the cases, with a female predominance in RA and CD (89.9% and 63.2%, respectively). Ages of psoriasis onset ranged from 7 years to 83 years; the mean age

Discussion

Psoriasiform lesions are a well-documented complication of TNF-α inhibitor therapy that can occur at any time during the treatment course.2 However, in our analysis, we found the majority (69.9%) occur within the first year of treatment. Furthermore, our review of published photographs suggests that many patients had generalized involvement with more than one morphological type. The typical presentations include plaque or palmoplantar pustular psoriasis, though various clinical morphologies

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    Drs Brown and Wang are co-first authors.

    Supported in part by grants from the National Institutes of Health (R01AR065174 and K08AR057763) to WL. National Clinical and Translational Science Institute (8KL2TR000143) to EL, and Dermatology Foundation Career Development Awards to EL and AH.

    Conflicts of interest: None declared.

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