Final answer:
PSA is a tissue-specific marker associated with prostate cancer, while the PCA3 test is a more accurate indicator of prostate cancer.
Step-by-step explanation:
PSA (prostate specific antigen) is a tissue-specific marker associated with prostate cancer. It is a protein enzyme produced by the normal prostate, but elevated levels of PSA in the blood may indicate the presence of prostate cancer.
The PCA3 test is another marker used for prostate cancer detection. It is a gene expressed in prostate epithelial cells and overexpressed in cancerous cells. A high concentration of PCA3 in urine is indicative of prostate cancer and is considered to be a more accurate indicator of cancer than the PSA test.