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Study Supports Using Low-Dose CT Scans to Spot Early Lung Cancer
Date:5/21/2013

By Barbara Bronson Gray
HealthDay Reporter

TUESDAY, May 21 (HealthDay News) -- Finding early signs of lung cancer was once next to impossible, but a new study adds to a growing body of evidence suggesting that screening with low-dose CT scans may help spot the beginnings of disease in high-risk patients.

Among patients considered at the greatest risk for lung cancer, 6 percent were found to have lung cancer after getting CT scans and follow-up biopsies to confirm the diagnosis. CT scans detect abnormalities at an earlier stage than standard X-rays, potentially giving patients a head start on lifesaving treatment.

As more advanced technology reduces the radiation risk of computerized tomography (CT) scans, the benefits of such screening could become greater than the downsides, which also include potentially unnecessary biopsies.

"It may someday be like using mammograms," said Dr. Stephen Machnicki, associate chair of radiology at Lenox Hill Hospital, in New York City.

The study affirmed what a lot of radiologists believe: There is a role for low-dose CT in screening for lung cancer, said Machnicki, who was not involved with the research.

The study, scheduled for presentation Tuesday at the American Thoracic Society annual meeting in Philadelphia, was based in part on results from the National Lung Screening Trial. That study, published in the New England Journal of Medicine in 2011, included more than 53,000 heavy smokers and found that those who received low-dose CT scans had a 20 percent lower risk of death from lung cancer than people who had standard chest X-rays.

Lung cancer, the leading cause of cancer deaths in the United States, usually forms in the cells lining air passages of the lungs. According to the U.S. National Cancer Institute, more than 228,000 new cases of lung cancer and almost 160,000 associated deaths are anticipated this year.

The researchers enrolled 84
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