Prostate Cancer Antigen 3 (PCA3) test looks for genetic material (messenger RNA (mRNA)) produced exclusively by the prostate. In normal prostate tissue, the protein PCA3 and its associated mRNA are present at low levels. PCA3 is found in high concentrations (overexpressed) in approximately 90% of prostate cancers.
Prostate specific antigen (PSA) is also increased in prostate cancers, but it can...
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