Healthcare providers may one day be able to diagnose lung cancer with a quick swab of the mouth. A recent study presented at an American Association for Cancer Research meeting suggests that damage to the mouth may indicate similar damage in the lungs caused by long-term tobacco exposure. Researchers found that 127 chronic smokers had the same cell abnormalities in their mouths and lung tissue more than 90 percent of the time. Researchers are excited about one day possibly adding a quick, painless, noninvasive cancer-detection tool to their diagnostic arsenal. In the meantime, you can do your part to avoid developing lung cancer in the first place: Stop or don’t start smoking, avoid secondhand smoke exposure, test your home for radon gas and limit workplace exposure to dust and fumes.