Why don't all smokers get lung cancer?

Multiple factors. Nonsmokers as well as smokers can develop lung cancer, a disorder that involves genetic and other factors. Smoking is a major contributing cause but other mechanisms come into play such a genetic predisposition.

Related Questions

What to do if I know not all smokers get lung cancer, but what about other problems?

Smoking. Smoking is related to all sorts of cancers, not just lung, diseases of blood vessels in the body, limitations of exercise capability, etc. It is among the worst of the potentially controllable risk factors. Read more...

What is the percentage of smokers get lung cancer or emphysema?

15-17% About 15-17% of smokers develop lung cancer or emphysema. About 85% of patients with lung cancer have been exposed to significant amounts of cigarette smoke. Read more...
Getting and dying... Sir richard peto the epidemiologist estimated that those who continue to smoke after age 35 have a 50% risk of dying of it...Heart, disease joins lung failure and cancer in the chest, but with each day more links to tobacco and many other cancers. My number is 14% of smokers get lung cancer. Smoking is addictive. Tobacco companies hate to admit this.Quit, never start, get help. Read more...

Can marijuana only smokers get lung cancer? If so, where does one find case studies or database to find these people?

Yes. Yes there is an increased risk. Google 'marijuana and lung cancer' and you will find several studies confirming the association. Read more...
No registry as far. As i know, but cases in the literature are limited to very heavy smokers, particularly people for whom it is a cultural and religious experience (rastafarians in jamaica, for example). The overwhelming majority of regular marijuana smokers also smoke tobacco, so it is hard to tease these apart. In general, the "tars" in marijuana are less harmful than tobacco, but there may be additives;herbicide. Read more...

How come some smokers don't get lung cancer?

Not fully know. Not fully know, possibly genetics. Importantly, smoking is the primary risk factor for causing 90% of lung cancer. Though it is clear that some people who smoke their whole lives never develop lung cancer, quitting smoking remains the most important aspect of lung cancer prevention and should be strongly encouraged. Read more...

How do you get lung cancer? If you don't smoke? Myparents smoked, but I always hated the way the stuff smelled. When I got older, I made them go outside to smoke, and I haven't been around smokers in years. Sohow could I have lung cancer?

While . While smoking is the major modifiable risk factor leading to lung cancer, not all lung cancer is related to smoking. Other risk factors include second hand smoke, asbestos, and organic solvents. There are potential dietary (vitamin a, vitamin e, beta carotene) and genetic risk factors (?Cystic fibrosis), as well as the presence of emphysema and pulmonary fibrosis that could predispose to the development of lung cancer. Second hand smoke could be relevant here. I would recommend further testing. Read more...
I . I agree with dr. Leeman's answer entirely. Clearly, the most common cause of lung cancer is due to cigarette smoking. As an added piece of information, exposure to radon gas, usually by way of poorly vented basements, is one of the more likely causes of lung cancer when smoking is not a factor. You live in cook county, illinois and in general, it is listed as a county with moderate potential for levels of radon (in the range of 2-4 pci/l). You may want to have your home assessed for radon levels and if they are elevated have a reputable radon mitigation company discuss options for your home - usually a simple venting system is all that is needed. Read more...
Yes. I would have to agree with drs cassivi and leeman. You can also learn more at the following link: http://www.Cancer.Net/cancer-types/lung-cancer. Read more...

I am just curious about what are the first symptoms of lung cancer, how long does it take a smoker to get it and what is the average age of diagnosis?

None. Early stage lung cancers do not have any symptoms there is no accepted mass screening test for eararly detection low yield do not justify mass screening with spiral ct scans , smoking is a convincing cause, some lucky ones may escape, but you can't predict who will get and who will not get , and how long you need to smoke to get lung cancer. Read more...
Often asymptomatic. This is often asymptomatic with about 5-15% detected from symptoms. Pesistent cough is the usual presenting sign, with hemoptysis, wheeze, dyspnea or difficulty breathing, depending on its site. Hoarseness, and respiratory failure can mean spread beyond the lungs. This occurs most at 55-65 years and since smoking is the most common cause, it likely takes from its start so don't start smoking. Read more...
Often none. Lung cancer is often asymptomatic, resulting in late stage diagnosis. The following links may assist you in each portion of your question: http://goo.Gl/2yuxg and http://goo.Gl/vvhhy and http://goo.Gl/gu9ms. Read more...

How can my friend get lung cancer without ever smoking or being around smokers?

It can happen... Unfortunately, some people - albeit a minority - can get lung cancer without having ever smoked or been around smokers. Although it is not a "genetic disorder, " per se, these people clearly have a genetic predisposition to get the disease. It is truly tragic, and many times, unexplainable. But, if diagnosed early, it is definitely treatable, like most other cancers not associated with smoking. Read more...
Not uncommon. Smokers are most common, but there are others who have genetic or inhalation issues. Read more...