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{{Lung cancer}}
{{Lung cancer}}


{{CMG}}; '''Associate Editor(s)-In-Chief:''' Kim-Son H. Nguyen, M.D., M.P.A., Beth Israel Deaconess Medical Center, Harvard Medical School, Boston MA, {{CZ}}
{{CMG}}; {{AE}}  {{KSH}} {{CZ}} {{SH}}


==Overview==
==Overview==
Lung cancer is the deadliest type of cancer for both men and women. Each year, more people die of lung cancer than breast, colon, and prostate cancers combined.
The direct cause of lung cancer is [[DNA mutations]] that often result in either activation of [[Proto-oncogene|proto-oncogenes]] (e.g. '''[[KRAS|K-RAS]]''') or the inactivation of [[Tumor suppressor gene|tumors suppressor genes]] (e.g. '''[[TP53]]''') or both. The risk of these [[genetic mutations]] may be increased following exposure to environmental insults.


Lung cancer is more common in older adults. It is rare in people under age 45.
==Causes==
*The direct cause of lung cancer is [[DNA mutations]] that often result in either activation of [[Proto-oncogene|proto-oncogenes]] (e.g. '''[[KRAS|K-RAS]]''') or the inactivation of [[Tumor suppressor gene|tumors suppressor genes]] (e.g. '''[[TP53]]''') or both.<ref>American Cancer Society. Cancer Facts & Figures 2017.
Atlanta: American Cancer Society; 2017.</ref><ref name="pmid23122493">{{cite journal |vauthors=Karachaliou N, Mayo C, Costa C, Magrí I, Gimenez-Capitan A, Molina-Vila MA, Rosell R |title=KRAS mutations in lung cancer |journal=Clin Lung Cancer |volume=14 |issue=3 |pages=205–14 |year=2013 |pmid=23122493 |doi=10.1016/j.cllc.2012.09.007 |url=}}</ref>
*The risk of these [[genetic mutations]] may be increased following exposure to environmental insults, which are regarded as [[Risk factor|risk factors]] that [[Predisposition|predispose]] to the development of lung cancer.


Cigarette smoking is the leading cause of lung cancer.
*To view a comprehensive list of [[Risk factor|risk factors]] that increase the risk of lung cancer, click [[Lung cancer risk factors|'''here''']].
 
The more cigarettes you smoke per day and the earlier you started smoking, the greater your risk of lung cancer. There is no evidence that smoking low-tar cigarettes lowers the risk.
 
However, lung cancer has occurred in people who have never smoked.
 
Secondhand smoke (breathing the smoke of others) increases your risk of lung cancer. According to the American Cancer Society, an estimated 3,000 nonsmoking adults will die each year from lung cancer related to breathing secondhand smoke.


==References==
==References==
{{reflist|2}}
{{reflist|2}}
{{Tumors}}
{{SIB}}


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[[Category:Types of cancer]]
[[Category:Pulmonology]]
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[[Category:Lung cancer]]
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Latest revision as of 13:47, 3 July 2019

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: Kim-Son H. Nguyen M.D. Cafer Zorkun, M.D., Ph.D. [2] Dildar Hussain, MBBS [3]

Overview

The direct cause of lung cancer is DNA mutations that often result in either activation of proto-oncogenes (e.g. K-RAS) or the inactivation of tumors suppressor genes (e.g. TP53) or both. The risk of these genetic mutations may be increased following exposure to environmental insults.

Causes

  • To view a comprehensive list of risk factors that increase the risk of lung cancer, click here.

References

  1. American Cancer Society. Cancer Facts & Figures 2017. Atlanta: American Cancer Society; 2017.
  2. Karachaliou N, Mayo C, Costa C, Magrí I, Gimenez-Capitan A, Molina-Vila MA, Rosell R (2013). "KRAS mutations in lung cancer". Clin Lung Cancer. 14 (3): 205–14. doi:10.1016/j.cllc.2012.09.007. PMID 23122493.

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