Psoriasiform dermatitis during dupilumab treatment for moderate‐to‐severe atopic dermatitis in children

Background/Objectives Psoriasiform eruptions after initiation of dupilumab have been previously described in adults. This report details the risk of developing or unmasking psoriasiform eruptions after initiation of dupilumab in children. Methods Records of patients ≤18 years of age with atopic dermatitis who developed psoriasiform dermatitis during treatment with dupilumab were reviewed retrospectively. Results Six children, 4–18 years of age, on dupilumab for severe atopic dermatitis developed new‐onset psoriasiform dermatitis at a median duration of 8 months (range, 6‐12 months) after dupilumab initiation. Typical locations of psoriasis were involved (face, scalp, trunk, and extensor extremities). The majority showed clearance or near clearance with the use of medium‐strength to potent topical corticosteroid ointments and 83% continued use of the dupilumab. A 7th patient had psoriasis, in addition to severe atopic dermatitis, and the psoriasis was unmasked by its failure to respond to dupilumab. Conclusion Although unusual, psoriasiform lesions can appear during effective treatment with dupilumab for atopic dermatitis, potentially reflecting a shift toward cutaneous IL‐23/TH17 pathway activation with dupilumab‐induced suppression of type 2 immunity.