RESUMO
Sweet (SS) syndrome is a neutrophilic dermatosis, characterized by a rapid onset of painful erythematous-purplish papules, nodules or plaques, accompanied by fever and associated with a dermal neutrophil infiltrate. CASE REPORT: Male, 69 years old, with a history of mild plaque psoriasis, arterial hypertension, gastroesophageal reflux and chronic sinusitis. He consulted for a 24-hour period characterized by headache and pain in the scalp. The examination highlights fever (38.5°), with slight erythema, sensitivity to palpation and some psoriasis plaques on the scalp. 48 hours later, it presents extensive painful erythematouspurplish plaques, present only on his right face and scalp. Biopsy was informed as Sweet Syndrome. He completed 14 days on prednisone, with excellent clinical evolution. DISCUSSION Sweet syndrome is classified into three categories: classic or idiopathic (most common), drug induced and associated with malignancy. In addition, other conditions have been described which may be related to: infections, autoimmune diseases, pregnancy. The management is focused on investigating an underlying cause and the use of corticosteroids, as a first line therapy. We report a case of idiopathic Sweet syndrome with atypical presentation, which was initially interpreted as facial cellulitis, with a rapid response to systemic corticosteroids. (AU)