Urachal Remnant Calcification: A Rare Cause of Calcification Within the Urinary Bladder.

Calcification of the urachal remnant is a rare cause of urinary bladder calcification. We present a case of calcification of the urachal remnant found incidentally on computed tomography (CT) scan in the setting of trauma. Our case clearly illustrates that reformatting images in the sagittal plane can clearly delineate the median umbilical ligament and its relationship to the calcification for confirmation of the diagnosis. Recognition of the characteristic appearance of this entity ensures prompt diagnosis and avoids unnecessary workup for other causes of calcification within the bladder.