Pyoderma vegetans (PV) is an inflammatory dermatosis, characterized clinically by large exudative vegetating plaques, and histopathologically by epidermal pseudoepitheliomatous hyperplasia and dense inflammatory infiltrates. Although PV is a very rare condition, it is a chronic disorder that may accompany any systemic process that compromises immunity. Treatment is very difficult, and correction of predisposing causes may be useful. We present a 49-year-old woman affected by severe psoriatic arthritis since she was 19, with giant verrucous plaques on her lower limbs that had worsened progressively during the last 15 years. After ruling out other vegetating cutaneous disorders, PV was diagnosed in association with psoriasis. Despite numerous previous systemic and topical therapeutic attempts no response was observed. Etanercept was introduced, which resulted in a marked improvement within 3 weeks. Herein, we report a diagnostic and therapeutic challenge of the first case of PV associated with psoriasis that presented a good response to etanercept.
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