A type of X-ray called spiral computed tomography or CT can find lung cancer early, but it is expensive and also finds non-cancerous lesions that are expensive and risky to test.

一种立体计算机体层扫描能够发现早期肺癌，但费用昂贵，并能发现一些检测昂贵、有风险的非肿瘤病变。

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Small-cell lung cancer is the more aggressive of the two, meaning it can spread quickly to other parts of the body early in the disease.

一种是小细胞肺癌，这种肺癌更具侵袭性，在早期就能扩散到其他器官。

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Can lung cancer be found early?

能否发现早期的肺癌？

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Since 2004, the National Cancer Institute has been conducting trials to see if CT scans (and standard chest X-rays) can reduce mortality in smokers by detecting lung cancer early.

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Bayer and biotech Onyx Pharmaceuticals announced a devastatingly disappointing result for their cancer pill Nexavar: They stopped a study of the drug in non-small cell lung cancer early because there was no chance it would reach its main goal of proving Nexavar extends patients' lives in that disease.

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The study was published in the New England Journal of Medicine, which did not reveal, at the time, that some funding came from a group called the Foundation for Lung Cancer, Early Detection, Prevention and Treatment.

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