In a single-center retrospective analysis of 102 patients with psoriasis induced by tumor necrosis factor (TNF) inhibitors, most cases improved or resolved with use of topical medications or with discontinuation of the inciting TNF inhibitor, with or without other interventions. All patients were treated and diagnosed by dermatologists.
While TNF inhibitors have revolutionized management of numerous debilitating chronic inflammatory diseases, they are associated with mild and potentially serious adverse reactions, including de novo psoriasiform eruptions, noted Sean E. Mazloom, MD, and colleagues, at the Cleveland Clinic, Cleveland, Ohio, in the Journal of the American Academy of Dermatology. Despite the fact that it has been more than 15 years since the first reports of TNF inhibitor-induced psoriasis, optimal treatment strategies still remain poorly understood.
IBD and RA most common
Dr. Mazloom and colleagues identified 102 patients (median onset, 41 years; 72.5% female) with TNF inhibitor-induced psoriasis seen at a single tertiary care institution (the Cleveland Clinic) over a 10-year period. The authors proposed a treatment algorithm based on their findings.
Inciting TNF inhibitors were prescribed most commonly for inflammatory bowel disease (IBD) (52%) and rheumatoid arthritis (RA) (24.5%). The most common inciting TNF inhibitor was infliximab (52%). TNF inhibitor-induced psoriasis improved or resolved with topical medications alone in 63.5% of patients, and cyclosporine and methotrexate (10 mg weekly) were often effective (cyclosporine in five of five patients; methotrexate in 7 of 13) if topicals failed.
Noting that the success with topicals in this cohort exceeded that of earlier reports, the authors suggested that more accurate diagnoses and optimal strategies attributable to the involvement of dermatologists may be explanatory.
In 67% of refractory cases, discontinuation of the inciting TNF inhibitor with or without other interventions improved or resolved TNF inhibitor-induced psoriasis. With switching of TNF inhibitors, persistence or worsening of TNF inhibitor-induced psoriasis was reported in 16 of 25 patients (64%).
Algorithm aims at balancing control
The treatment algorithm proposed by Dr. Mazloom and colleagues aims at balancing control of the primary disease with minimization of skin symptom discomfort and continuation of the inciting TNF inhibitor if possible. Only with cyclosporine or methotrexate failure amid severe symptoms and less-than-optimal primary disease control should TNF inhibitors be discontinued and biologics and/or small-molecule inhibitors with alternative mechanisms of action be introduced. Transitioning to other TNF inhibitors may be tried before alternative strategies when the underlying disease is well-controlled but TNF inhibitor-induced psoriasis remains severe.
“Most dermatologists who see TNF-induced psoriasis often are likely already using strategies like the one proposed in the algorithm,” commented senior author Anthony Fernandez, MD, PhD, of the Cleveland (Ohio) Clinic, in an interview. “The concern is over those who may not see TNF inhibitor-induced psoriasis very often, and who may, as a knee-jerk response to TNF-induced psoriasis, stop the inciting medication. When strong side effects occur in IBD and RA, it’s critical to know how well the TNF inhibitor is controlling the underlying disease because lack of control can lead to permanent damage.”
Risk to benefit ratio favors retaining TNF inhibitors
The dermatologist’s goal, if the TNF inhibitor is working well, should be to exhaust all reasonable options to control the psoriasiform eruption and keep the patient on the TNF inhibitor rather than turn to potentially less effective alternatives, Dr. Fernandez added. “The risk:benefit ratio still usually favors adding more immune therapies to treat these reactions in order to enable patients to stay” on their TNF inhibitors.
Study authors disclosed no direct funding for the study. Dr Fernandez, the senior author, receives research funding from Pfizer, Mallinckrodt, and Novartis, consults for AbbVie and Celgene, and is a speaker for AbbVie and Mallinckrodt.
SOURCE: Mazloom SE et al. J Am Acad Dermatol. 2020 Dec;83(6):1590-8.