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Lung Cancer Stages
Cancers are staged depending on how far they have spread. Staging a cancer correctly is essential to select the most appropriate treatment option. A number of diagnostic tests, such as CT scans, MRIs, bronchoscopy, blood tests, bone scans, and biopsies are used to find out how far the cancer has spread. Non-small cell lung cancers, which account for about 80 percent of lung cancers, are staged using the Roman numerals 0 through IV. If a cancer is too small to be detected, it is called an occult or hidden cancer and not assigned any numeral. Stage 0 cancer, or carcinoma in situ, is limited to the lung and only involves a few layers of cells. Stage I cancer is still limited to the lung, with an area of normal tissue surrounding it. S...
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