Beware of Perianal Pain: Fournier Gangrene

A 69-year-old Japanese man without significant comorbidities experienced anal pain 5 days before he was initially examined. Although he had been aware of a 5-mm perianal mass for a long time, he had ignored it because it had not caused any issues. Subsequently, he developed a fever of 38°C, his perianal pain worsened daily, and he was seen at our hospital’s emergency department. He did not have any urinary symptoms and denied recent sexual intercourse. There was no significant family history.