text: <unk>  (EPCA-2) is a protein of which blood levels are elevated in prostate<unk> . It appears to provide more accuracy in identifying<unk>  prostate<unk>  than the standard prostate<unk>  marker, PSA.
option_0: Early prostate cancer antigen-2
option_1: Tumor marker
option_2: Prostate specific antigen
option_3: Transitional cell carcinoma classification
option_4: Transitional cell carcinoma MRI
option_5: Carcinoembryonic antigen
option_6: Transitional cell carcinoma CT
option_7: Transitional cell carcinoma staging