New research shows that light and a bacterium from the bottom of the ocean may provide success in treating men with early-stage prostate cancer.

The standard of care for most early, localized prostate cancers is to take a watch-and-wait approach, forgoing treatment unless the disease worsens.

But there may soon be another option. Researchers in Britain are experimenting with a form of light therapy, using a laser beam that targets cancer cells and destroys them.

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