Here is a case of a urachal cyst, one of the congenital urachal anomalies, with imaging signs suggestive of infection including wall thickening and turbid fluid content. It is presumed to be the cause of recurrent urinary tract infection in this child. We can also note a mildly thickened urinary bladder wall consistent with cystitis.

The urachal cyst commonly occurs at the mid urachus however sometimes, it is seen contiguous with the urinary bladder wall as in this case. It is an asymptomatic incidental finding until complicated with infection or bleeding.

For an infected urachal cyst, bladder adenocarcinoma should be considered in the differential diagnosis.