For US residents only

What is PSA and why is it important?


Prostate-specific antigen, or PSA, is a biomarker you have been checking since you were diagnosed with prostate cancer. PSA can be measured through a routine blood test.

A rise in your PSA number or a rising PSA can tell you your cancer is progressing.

How PSMA is different from PSA


PSA and prostate-specific membrane antigen (PSMA) are both important biomarkers for you to check, and they tell you different things. Unlike PSA, which is detected through a blood test, PSMA can be detected with a PSMA PET scan.

PSMA can tell if your cancer has progressed and where in your body it has spread.

Biomarker: a characteristic of your cancer that can be measured and give your doctor more information about your cancer.

PET: positron emission tomography.

PSMA PET scan: an imaging test that allows your doctor to check for PSMA-positive (PSMA+) cancer in your body.