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	Since this article does not have an abstract, we have provided the first 150 words of the full text and any section headings.

Of all the types of cancer, lung cancer is responsible for the most deaths in men and in women. Tobacco smoking is thought to be responsible for 8 out of 10 cases of lung cancer. Smoking greatly increases the risk of developing lung cancer because tobacco smoke contains carcinogens (substances that can cause cancer). At this time, stopping smoking is the only proven method for reducing the risk of developing lung cancer. Exposure to second-hand smoke from being around people who smoke also increases the risk of developing lung cancer. The August 24/31, 2005, issue of JAMA includes an article on staging (see below) of lung cancer. This Patient Page is based on one published in the January 15, 2003, issue of JAMA.

SYMPTOMS OF LUNG CANCER

• Persistent cough
  
• Constant chest pain
  
• Fatigue
  
• Loss of appetite or weight loss
  
• Recurrent pneumonia
  
• Swelling of neck and face
  
• Coughing up blood
  

Sharon Parmet, MS, Writer; Cassio Lymn, MA, Illustrator; Richard M. Glass, MD, Editor

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