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ST. LOUIS – Lung cancer is the number one cause of cancer deaths. It accounts for almost 1 in 4 cancer deaths in the U.S. Smoking is one of the main factors that cause lung cancer. The sooner the cancer is diagnosed, the better for the patient and that means screenings. But some people were not able to get screening for lung cancer, but now, there is a federal rule change that may make that possible. Washington University physician at Siteman Cancer Center Dr. Ruben Nava had more information. Click here to learn more.