Which of the following is true about the top four reasons for urinary diversion?

• A. Bladder cancer
• B. Appendicitis
• C. Prostate cancer
• D. Liver disease

Answer: (A)

Urinary diversion is used when the bladder can no longer be used or cannot drain urine effectively, such as after removing the bladder due to disease. The most common reason for needing a diversion is bladder cancer, because treating that cancer often involves cystectomy, and urine must be routed through a new pathway (like an ileal conduit or a continent reservoir). The other options don’t fit typical indications: appendicitis and liver disease don’t affect the urinary drainage system, and while prostate cancer can affect urination, it is not a primary, common reason for creating a urinary diversion. So bladder cancer is the true and most common reason among the choices.