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One family's grief made way for a lifesaving organ transplant.
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Twin fetuses endanger each other's life within the womb.
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A freak heart tumor led to a massive stroke -- and clots throughout her body.
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With a daily dose of abiraterone, men with prostate cancer are staying alive.
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A new study suggests that low-carb diets may peel off more pounds than low-fat.
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Genes implicated in autism may pave the way for new therapies.
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Sight of his newborn son brings John Seville back to life.
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New report suggests sunshine vitamin may have significant cancer benefits.
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An experimental treatment for melanoma shows potential to cure other cancers.
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Inpatients celebrate their lives, as they become prom royalty for a day.
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Doctors are trying deep brain stimulation to treat severe depression.
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One major dermatology organization is making the case against indoor tanning.
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Many terminally ill patients think clinical trials give them a fighting chance.
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New research finds the 'sunshine vitamin' can slow progression of breast cancer.
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U.S. Marines rallied to rescue an Iraqi police officer's son.
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Umbilical cord blood can provide the cure for many life-threatening diseases.
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A new CDC study reveals 1 in 4 toddlers are improperly vaccinated.
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An experimental vaccine was Ryan DeGrand's last hope.
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More Cutting Edge reports from John McKenzie.