Cigarette smoking is the most important risk factor in the development of lung cancer. It is estimated that as many as 90 percent of lung cancer diagnoses could be prevented if cigarette smoking were eliminated. Environmental tobacco smoke in non-smokers also increases a person’s risk of developing lung cancer.
The most common signs of lung cancer are:
• Persistent cough
• Sputum streaked with blood
• Chest painRecurring pneumonia or bronchitis