Acute febrile neutrophilic dermatosis (Sweet syndrome).

We describe the third reported case of acute febrile neutrophilic dermatosis (Sweet syndrome) in the United States. In the majority of reported cases, the patients were female. However, in our case and in the two cases reported previously in the United States, the patients were male. In two of these three male patients, a malignant neoplasm has been found, possibly as a coincidence.