Lung cancer, which occurs in the bronchial mucosal epithelium, is also called bronchial carcinoma. In recent 50 years, reports on the incidence of lung cancer are significantly increased in many countries. Lung cancer even ranks the first among all cancers that may occur to male patients. The etiology of lung cancer is still not completely certified now, but large amounts of datum indicate that long-term smoking is one of the important pathogenic factors causing lung cancer. The following ten questions can detect whether you have signs of lung cancer:

　　1. If any of your direct relatives (parents, siblings, uncles and aunts ) have lung cancer? ( )

　　Yes: 1 score; No: 0 score

　　2. Your current age ?( )

　　20 to 39 years old: 1 score

　　40 to 49 years old: 2 scores

　　More than 50 years old: 3 scores

　　3. Smoking or not currently? ( )

　　Yes: 4 scores No: 0 score

　　4. Smoking or not in the past? ( )

　　Yes: 4 scores No: 0 score ( Jump to the 7th question)

　　5. If you are smoking currently, how many cigarettes you smoke every day? ( )

　　Less than 1 pack: 1 score

　　About 1 pack: 2 scores

　　One to one and a half packs: 3 scores

　　At least 2 packs: 4 scores

　　6. If you have quit smoking, then how long have you quit for that? ( )

　　Less than 5 years: -1 score

　　6 to10 years: -2 scores

　　11 to 20 years: -3 scores

　　More than 20 years: -4 scores

　　7. Whether live with the smokers together or not? ( )

　　Yes: 3 scores No: 0 score

　　8. Whether working in a place with lots of smokers or not? ( )

　　Yes: 3 scores No: 0 score

　　9. If you’re suffering from chronic bronchitis or emphysema? ( )

　　Yes: 2 scores No: 0 score

　　10. "Yes" for the 3rd question, plus 5 scores.

　　Results analysis:

　　Less than 7 scores: Risk degree is low, regular physical examination may be enough to detect the patient’s condition.

　　7 to 12 scores: Low to middle degree, chest CT scans or lateral projection is recommended to do when having regular check ups.

　　13 to 18 scores: Middle to high degree, chest CT scans or lateral projection is also suggested to do in addition to regular examinations.

　　More than 18 scores: High dangerous degree, chest low-dose spiral CT scan should be applied besides the above mentioned examinations.

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