È viola ma non fa paura: l'orticaria multiforme post-infettiva

The paper describes an 18-month-old girl who developed purpuric urticarial lesions during amoxicillin therapy for pulmonary consolidation. Differential diagnosis included vasculitis, systemic drug reactions and incomplete Kawasaki disease. The transient nature of lesions, absence of systemic involvement and favourable response to therapy supported a diagnosis of post-infectious urticaria multiforme. A positive respiratory swab for adenovirus suggested an infectious trigger. This case emphasizes the need for careful clinical assessment in paediatric cutaneous eruptions to avoid unnecessary investigations and inappropriate treatments.