Fournier's gangrene is a life-threatening disorder in which infection of the perineum and scrotum spreads along fascial planes, causing soft tissue necrosis. If urgent surgery is delayed, the disease will soon result in septic shock, multiorgan failure, and death. In this study, we present 21 patients with Fournier's gangrene who were treated in period between 1994 and 2001. Patients' charts were reviewed retrospectively and are discussed in the light of literature. All patients received aggressive surgical debridment. Penicillin or Ceftriaxone, aminoglicoside and metronidazole were administered intravenously. Of the 21 patients, 5 had scrotal carbuncle, 1 had urethral stricture, 1 had chronic indwelling urethral catheterization, 2 had perirectal abscess, and 1 had hemorrhoidectomy. In eleven patients we couldn't identify any cause. Twelve patients had diabetes mellitus, and two had chronic alcoholism. Escherichia coli was isolated in 12 purulent tissue cultures, and Bacteroides fragilis in eight. Seventeen patients survived, whereas four died. Fourier's gangrene is considered a surgical emergency. Early surgical intervention is essential, as the gangrene can spread rapidly at rates reaching 2 mm per hour. So that Fournier's gangrene is an abrupt, rapidly progressive, gangrenous infection of the external genitalia and perineum and is a real urologic emergency.