Prostate specific antigen

Topic #4: PSA Testing for Prostate Cancer in Men with No Symptoms of the Disease

Background

Prostate Specific Antigen (PSA) is a type of protein released by prostate tissue that is found in higher levels in a man’s blood when there is abnormal activity in the prostate, including prostate cancer or a condition called benign prostate hyperplasia (BPH), which is not cancer but a noncancerous growth of normal prostate cells that occurs with age. Ever since higher levels of PSA have been linked to a higher likelihood of having prostate cancer, there has been hope that PSA testing could be a simple way to find prostate cancer earlier.

Unknown Primary - Diagnosis

ON THIS PAGE: You will find a list of common tests, procedures, and scans that doctors use to find the cause of a medical problem. Use the menu to see other pages.

By its very nature, cancer of unknown primary (CUP) is found after it has spread to another part of the body from where it started, which is called metastasis. Therefore, doctors use many tests to try to find where in the body the cancer began, called the primary site. Some tests may also determine which treatments may be most effective.

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