[Sweet's syndrome: retrospective case series of 47 patients].

PURPOSE: Also called acute febrile neutrophilic dermatosis, Sweet's syndrome is an inflammatory disorder with a prominent cutaneous expression. It is characterized by a variety of manifestations, clinical and histological findings. The objective of this study was to describe their clinical, pathological and therapeutic characteristics.

METHODS: We report on a series of 47 patients who presented a Sweet's syndrome, collected in our institution in Tunis between 1997 and 2011.

RESULTS: The patient population consisted of 11 men and 36 women. The mean age was 47 years with extreme ranging from 28 to 74 years. An associated disorder was observed in ten patients: inflammatory disease (three cases), inflammatory bowel disease (two cases), tuberculosis (three cases) and diabetes (three cases). One case of pregnancy was observed. Cutaneous lesions consisted of erythematous plaques or nodules. Lesions were located mainly on the upper or lower extremities. All biopsy specimens demonstrated a dermal infiltrate composed predominantly of neutrophils. Fibrinoid necrosis and intramural inflammation were observed in eight cases.

CONCLUSION: The skin disorder can precede, follow, or appear concurrent with the diagnosis of an associated disease which requires careful surveillance.