Benign urachal cyst in an adult

Benign urachal cyst is a rare lesion in the adult. Prompt diagnosis and management are important to avoid complications. This report illustrates the value of computed tomography (CT) in establishing the diagnosis of urachal cyst in a case in which conventional radiography and ultrasonography were normal. In any patient with a history or physical findings suggestive of a urachal anomaly, CT is most useful in establishing the nature of the anomaly and extent of the lesion. In this case, CT findings of a soft tissue mass at the bladder apex continuing superiorly as a tubular structure were consistent with infected urachal cyst.