The most accurate non-invasive test for identifying if cancer has spread outside lung tissue is a

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Positron emission tomography (PET) is the most accurate non-invasive test for identifying if cancer has spread outside lung tissue. This test can show areas of increased metabolic activity, which can indicate the presence of cancer. A chest x-ray or sputum analysis may suggest the presence of cancer, but they are not as reliable for detecting cancer that has spread beyond the lung tissue. Bronchoalveolar lavage and mediastinoscopy are invasive procedures that may be used to collect tissue samples for further testing.

The Most Accurate Non-Invasive Test for Identifying If Cancer Has