For best quality of life, many cancer patients who can't be cured might do best to forgo chemo and focus instead on pain relief and easing sleep and mood problems, a survey of caregivers suggests. iStockphoto hide caption

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HPV vaccine prevents cervical cancer and other cancers by fending off the virus that causes them. But it's been a tough sell with doctors and parents. Joe Raedle/Getty Images hide caption

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In the movie The Fault in Our Stars, having terminal cancer doesn't look so bad for Hazel, played by Shailene Woodley, and Gus, played by Ansel Elgort. James Bridges/Temple Hill Entertainment/Kobal Collection hide caption

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Actress Rita Wilson arrives at the premiere of the documentary Fed Up in West Hollywood, Calif., in May 2014. Gus Ruelas/Reuters/Landov hide caption

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An architectural rendering of the Cleveland Clinic's planned cancer center. Courtesy of the Cleveland Clinic hide caption

itoggle caption Courtesy of the Cleveland Clinic

Dr. George Papanicolaou discovered that it was possible to detect cancer by inspecting cervical cells. The Pap smear, the cervical cancer screening test, is named after him. American Cancer Society/AP hide caption

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Science-based guidelines say there's no benefit to getting an EKG of heart activity before routine cataract surgery — even if the patient is old. But most doctors order such tests anyway. Bull's Eye/ImageZoo/Corbis hide caption

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Catharine Becker of Fullerton, Calif., was diagnosed with stage 3 breast cancer at 43 despite having a clean mammogram. The mother of three didn't know she had dense breast tissue until after she was diagnosed. Heidi de Marco/Kaiser Health News hide caption

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Sequencing the genes of a cancer cell turns up lots of genetic mutations — but some of them are harmless. The goal is to figure out which mutations are the troublemakers. Kevin Curtis/Science Source hide caption

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Anne Koller closes her eyes as an oncology nurse attaches a line for chemotherapy to a port in her chest. Koller typically spends three to six hours getting each treatment. Sarah Jane Tribble/WCPN hide caption

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The blood cancer in soft-shell clams poses no risk to humans, but it does kill the shellfish. Pat Wellenbach/AP hide caption

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