Background: Urachal anomalies rarely present in adulthood. We report thesecond known case of urachal-sigmoid fistula associated with diverticulardisease.Method: We performed a case report and literature review. We searchedMEDLINE and PubMed using the search words “urachus,” “urachal fistula,”“sigmoid colon” and “diverticulosis.”Results: Our literature review revealed 1 previous report of urachal-sigmoidfistula associated with diverticular disease. We reviewed other publications withrespect to pathophysiology, diagnosis and management of urachal disease.Conclusion: Urachal disease that presents in an adult is usually the result of somecomplication of a urachal anomaly. Various modes of imaging may help confirmthe diagnosis, although CT sinography has been recommended and waskey in the present case. Management includes eradication of infection and, usually,surgical intervention.