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U.S. National Institutes of Health National Cancer Institute
Dictionary of Cancer Terms
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PSA failure (...FAYL-yer)

 A rise in the blood level of PSA (prostate-specific antigen) in prostate cancer patients after treatment with surgery or radiation. PSA failure may occur in patients who do not have symptoms. It may mean that the cancer has come back. Also called biochemical recurrence and biochemical relapse.

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