This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Kidney & Ureturs, Subject name: Surgery
The Most important diagnostic investigation in renal cell carcinoma is: 
Select and explain. 
A. CT scan of abdomen and pelvis, B. MRI, C. USG, D. PET CT
A: CT scan of abdomen and pelvis
Answer: A: CT scan of abdomen and pelvis 
Explanation: Ans. (a) CT scan of abdomen and pelvisRef: Bailey 26thEdition, Page 1306; Campbell Urology 11th Edition, Page 1338* Most important investigation in RCC is CT scan of abdomen. Staging of RCC can be accomplished in most cases with a high quality abdominal CT scan.