Task: Answer Verification
Input (English): Question: Are cathepsin D serum levels a valid serum marker in renal cell carcinoma?
Answer: In contrast to overexpression of Cath D in primary RCC tissue, serum Cath D is not altered in RCC patients when compared with healthy volunteers. In this small cohort, Cath D serum levels did not reveal additional clinical information in patients diagnosed with a small renal mass. Further prospective multicenter studies might shed more light on the value of Cath D in the diagnostics of RCC.
Output (English): no