Treatment of paradoxical eczematous eruption in psoriasis treated with secukinumab: A case report.

Rationale: Eczematous eruption is an increasingly recognized form of drug-related eruption, typically reported in association with interleukin 17 (IL-17)A inhibitors. However, severe paradoxical eczematous eruption due to IL-17A inhibitors has been rarely reported. Herein, we reported a case of a man with severe psoriasis with erythematous scaly plaques on the scalp, trunk, and arms and legs after the administration of secukinumab was initiated.

Patient Concerns: We reported a case of a 20-year-old man with severe psoriasis with erythematous scaly plaques on the scalp, trunk, and arms and legs after the administration of secukinumab was initiated. A skin biopsy was performed. It revealed spongiotic dermatitis consistent with eczematous reaction. Direct and indirect immunofluorescence assays were negative.

Diagnoses: He was diagnosed with eczematous eruption.

Interventions: Discontinuation of secukinumab and administration of cyclosporine and prednisone were considered.

Outcomes: Significant improvement was observed, with no adverse events.

Conclusion: Our case shows that eczematous eruption can paradoxically occur in patients on IL-17A inhibitors and this report is expected to increase awareness of the rising number of cutaneous eruptions related to biological agents.