Cancer Clues in the Breath: Test Could Ease Screening

A simple breath test can detect changes in people who have undergone surgery for lung cancer, a new study reports. Researchers found that three chemical markers known as carbonyl compounds, which are gases released when people exhale, were reduced in patients with lung cancer after they had an operation to remove their tumors, compared with before their operations. This study demonstrated that levels of certain chemical markers associated with a tumor went down in people after they had surgery f