Multicentric urothelial carcinoma of the urinary bladder on CT scan

Image A is a transverse CT scan through the bladder and shows a 1.2 cm urothelial carcinoma (arrow) and a second 2 cm urothelial carcinoma in the anterior bladder wall that extends into the surrounding fat (arrowhead). Image B is a magnified view of A and shows the two lesions, one situated posteriorly (arrow) and the second situated anteriorly, extending into the perivesical fat (arrowhead).