A coronal reformatted CT scan of the abdomen and an axial CT scan of a 41-year-old patient with urinary frequency and dysuria is presented for your reference. Based on the radiological image, what is the most likely diagnosis for this patient?

NOTE: No other information about the patient is available. (Answer is posted in the comment section below!) *This Case Challenge is from the Editorial Team of Docplexus and is meant for educational purposes only.