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Radioactive seed implantation
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Radioactive seeds are tiny pieces of radioactive material that
are placed in your prostate gland (a procedure known as
implantation or "brachytherapy") and release high doses of
radiation in the prostate. The seeds are permanent, emitting
decreasing amounts of radiation for about one year, until the
seeds are no longer radioactive. Because the radiation dose is
localized to the prostate, side effects to other organs are minimized.
Radioactive seed implantation can be performed either alone or in
conjunction with other treatments. This decision will be based on a
review of your prognostic factors,
which help predict the risk of the cancer spreading beyond
the prostate. Accompanying treatments include:
- External beam radiation therapy
If you and your radiation oncologist decide that both implantation
and radiation therapy are necessary, external beam radiation therapy
will be completed first. Treatment lasts five weeks. The radioactive
seed implantation will take place about three to four weeks after the
radiation therapy has ended.
- Hormone therapy
Depending on the size of the prostate and prognostic factors, you may need
to be placed on a hormone therapy regimen after the implantation. Your
radiation oncologist will discuss this option with you.
If you decide to undergo radioactive seed implantation,
you will first undergo a volume study, followed by either
implantation or external beam radiation therapy.
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