A previously healthy 63-year-old man comes to the physician because of difficulty starting urination, decreased force and size of the urine stream, and dribbling when he tries to stop urinating. Cystoscopy shows hypertrophy and thickening of the bladder wall and dilation of the ureters. If untreated, which of the following sequelae is most likely?
A)Renal papillary necrosis
B)Retroperitoneal fibrosis
C)Transitional cell carcinoma of the bladder
D)Urethral diverticulum
E)Urinary tract infection