Table 1.

Radiological findings of a urachal cyst.

Mode	Findings of a non-infected urachal cyst	Findings of a infected urachal cyst
USS	A smooth edged, cystic lesion in the lower abdominal wall may be found.	A thick, irregular wall with mixed internal echogenicity may be seen.
CT	A thin walled, homogeneous and non-enhancing cystic mass between transverse fascia and parietal peritoneum with no connection between cyst and other structures.	Irregular and thickening wall and in homogeneous attenuation higher than water is observed.
MRI	A urachal cyst may be seen as a well-defined, thin wall cystic structure with sagittal images helpful in demonstrating anomalies between umbilicus and urinary bladder dome.
	For morphologic display, non-infected urachal cysts show homogeneous isointense or hyperintense signals dependent upon image study. Contrast enhanced studies are needed to improve imaging.