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Why do urologists use psa tests of blood to determine whether there is a likelihood of prostate cancer?

The blood has all sorts of debris and material that could affect the psa reading for example ,medications, vitamin pills, over the counter medications, as well as bacteria, and waste products headed for the kidneys. Shouldn’t there be a better way to determine cancer of the prostate, such as a marker in ejaculatory semen, which is straight from the prostate, and not a bi-product of cancer’s presence such as prostate specific antigen that floats around in the blood, is the product of a reaction or process going on in the prostate and is subject to many substances in the blood that could mimic or otherwise affect a prostate specific antigen test?

Blood is involved in immunity where semen is not, so the blood tends to pick up these bad cells out of the tumor. Also, it is much easier to collect blood than semen, especially in older men.

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This entry was posted on Friday, October 2nd, 2009 at 8:44 pm and is filed under prostate vitamins. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.

2 Responses to “Why do urologists use psa tests of blood to determine whether there is a likelihood of prostate cancer?”

  1. Peter Says:
    October 3rd, 2009 at 2:22 am

    Blood is involved in immunity where semen is not, so the blood tends to pick up these bad cells out of the tumor. Also, it is much easier to collect blood than semen, especially in older men.
    References :

  2. Micheal Says:
    October 3rd, 2009 at 2:48 am

    prostate cancer information
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