RT Book, Section A1 Cohen, Philip R. A1 Kurzrock, Razelle A2 Kang, Sewon A2 Amagai, Masayuki A2 Bruckner, Anna L. A2 Enk, Alexander H. A2 Margolis, David J. A2 McMichael, Amy J. A2 Orringer, Jeffrey S. SR Print(0) ID 1161329109 T1 Sweet Syndrome T2 Fitzpatrick's Dermatology, 9e YR 2019 FD 2019 PB McGraw-Hill Education PP New York, NY SN 9780071837798 LK dermatology.mhmedical.com/content.aspx?aid=1161329109 RD 2024/04/19 AB AT-A-GLANCESweet syndrome, also referred to as acute febrile neutrophilic dermatosis, is characterized by a constellation of symptoms and findings: the acute onset of fever, neutrophilia, tender erythematous skin lesions that typically show mature neutrophils in the upper dermis, and—after initiation of systemic corticosteroids—a prompt improvement of both symptoms and lesions.Extracutaneous manifestations of Sweet syndrome can include cardiovascular, central nervous system, gastrointestinal, hepatic, musculoskeletal, ocular, oral, otic, pulmonary, renal, and splenic organs.Infection of the upper respiratory tract and/or gastrointestinal tract, inflammatory bowel disease, and pregnancy may be associated with classical Sweet syndrome.In individuals with previously undiagnosed or relapsing hematologic malignancies and solid tumors, malignancy-associated Sweet syndrome may occur as a cutaneous paraneoplastic syndrome.The onset of the dermatosis in patients following the initiation of certain medications—drug-induced Sweet syndrome—is most commonly associated with granulocyte colony-stimulating factor.The pathogenesis of Sweet syndrome remains to be established; cytokines—directly or indirectly—may have an important etiologic role.Corticosteroids, potassium iodide, and colchicine are the first-line oral systemic agents for treating Sweet syndrome.Indomethacin, clofazimine, cyclosporine, and dapsone are the second-line oral systemic agents for treating Sweet syndrome.Localized Sweet syndrome lesions may be effectively treated with the topical application of high-potency corticosteroids or intralesional corticosteroids.