Normally, the urachus is obliterated at the latest in early infancy and degenerates to a fibrous band extending from the bladder to the umbilicus. Urachal anomalies may develop through an absent or incomplete obliteration, which more commonly cause clinical problems in children. Urachal cysts (UC) represent the most common form in adulthood. They most likely remain asymptomatic until complications occur. We report the case of a 32-year-old man with abscess formation in the abdominal wall as a complication of an infected ruptured UC.