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What is considered to be a high PSA level in the blood?

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An elevated prostate-specific antigen (PSA) level can be a reading that is above 4.0 nanograms per deciliter, according to WebMD. However, PSA levels tend to increase as a man ages. If men have elevated PSA levels, it does not necessarily mean that he has cancer because there are many other conditions that can cause this elevation.

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Some other factors that can cause an elevation in PSA levels are an enlarged prostate and prostatitis, reports the National Institutes of Health's MedlinePlus. When a man does have an elevated PSA level, it indicates that further testing such as a prostate biopsy is necessary to confirm that it is prostate cancer.

The normal PSA level is given as being below 4.0 nanograms per deciliter of blood. However, recent studies seem to indicate that this number should be lowered to either 2.5 or 3.0 nanograms per deciliters, explains WebMD. This is because men, who have PSA levels that are in the acceptable normal range, can have prostate cancer.

The prostate manufactures the protein called PSA. A PSA blood test can help in the diagnosis of prostate cancer, but other tests are required to confirm if it is cancer.

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