Paradoxical psoriasiform reactions to anti-TNFα drugs in hidradenitis suppurativa

Abstract

Paradoxical psoriasiform reactions to anti-tumor necrosis factor α (TNFα) agents occur with an incidence of 0.3 to 5.6% in patients with inflammatory bowel diseases and rheumatic diseases¹. Various clinical features have been described while histopathological findings often show lichenoid infiltrate, spongiosis associated with a psoriasiform pattern and a "type I interferon (IFN) signature " in immunohistochemistry²

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