Which of the following statements about renal cell carcinoma (RCC) is incorrect?
A、RCC is categorized into several subtypes, based mainly on how the cancer cells look under a microscope.
B、The common locations for metastases are the liver and the brain.
C、Hematuria is the most frequent symptom, occurring in more than 50% of cases.
D、Treatment and prognosis depend upon the extent of tumor involvement.