Dupilumab-Associated Erythema Multiforme-Like Eruption With Lichenoid Histology in a Paediatric Patient: A Case Report.
Paul Sun Woo Kim, Jacqueline Tu, Kelvin Truong et al.
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Case in brief
A 5-year-old boy with eczema developed erythematous targetoid papules and plaques on his upper and lower limbs while receiving dupilumab. Skin biopsy showed a lichenoid interface reaction, supporting an erythema multiforme-like eruption with lichenoid histology. Dupilumab was discontinued, and the eruption was treated with topical corticosteroids. The lesions resolved, leaving mild post-inflammatory hyperpigmentation.
What made this case unusual
The eruption had an erythema multiforme-like clinical appearance but lichenoid interface histology in a paediatric patient receiving dupilumab.
Diagnostic / clinical pearl
Targetoid lesions during dupilumab therapy may have lichenoid histology; biopsy can help characterize an erythema multiforme-like drug-associated eruption.