NB-UVB phototherapy in the treatment of anti-PD-1 inhibitor induced psoriasis: A case report

Immune-mediated cutaneous reactions are a frequent occurrence in cancer patients treated with immune checkpoint inhibitors. A small subset of these adverse events are psoriasiform reactions. To date, there is no high-level evidence supporting the most appropriate management of this often debilitating dermatologic side effect. In many cases where topical therapy is ineffective, oral steroids are often prescribed which may lead to poorer outcomes in cancer patients. In this case report and review, we describe the clinical courses of two patients with anti-PD-1 inhibitor induced psoriasiform reactions who were treated with narrow band UVB phototherapy. We review the rationale, advantages, and disadvantages of this underutilized treatment as a therapeutic option to spare cancer patients from systemic immunosuppressive agents.