Could it be lung cancer? About 25 percent of people who have lung cancer will show no symptoms before they're diagnosed. These patients' cancer is often diagnosed from a routine chest X-ray or from a CT scan done for other reasons. But most people who are diagnosed with lung cancer do have signs and symptoms of the disease. In this slideshow, we take a look at 7 common signs and symptoms of lung cancer. Wheezing Wheezing--a whistling sound made when someone with a constricted airway... Read More