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NAME | METHOD | REFERENCE RANGE | UNITS |
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PSA Free | ICMA | By Report | ng/mL |
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PSA Total | ICMA | < 4.00 | ng/mL |
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% Free PSA | CALC | By Report | % |
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TYPE | VOLUME | TEMPERATURE | INSTRUCTIONS |
PRIMARY | ||||
1 | Serum | 2 (1) mL | Ambient - 5 Day(s), Refrigerated - 5 Day(s), Frozen - 2 Month(s) |
The percent free PSA is inversely proportional to the risk of prostate cancer. Elevated total PSA and low % free PSA indicate an increased likelihood of finding prostate cancer. Conversely, low total PSA and elevated % free PSA indicate a decreased likelihood of finding prostate cancer. Serial measurements of PSA are useful in determining recurrence of prostate cancer after treatment. |