What is the usual cause of lung cancer?

Smoking. Although three are some common causes of lung cancer by far the most common culprit is cigarette smoking.
Inhalants. Tobacco, marijuana, and other inhalants are the most common causes. This link provides a list of main risk factors: http://www.Cancer.Net/cancer-types/lung-cancer/risk-factors-and-prevention.
Smoking. Tobacco smoking is the usual cause of lung cancer. About 10% of lung cancers may occur in non-smokers. Second hand smoke and exposure to radon gas are the next important causes. Of course genetic susceptibility always plays a role in all diseases, including lung cancer.

Related Questions

Can any doc tell me what's the 2nd most common cause of lung cancer?

Almost in order. 1st cigaretts then: pipe and cigars, asbestos, radon family genes. History of lung ca pollution. People forget radon alot for non smokers. Hope it helps. Look at the american cancer society web site. Read more...
I say air pollution. The politically correct answer used to be radon on the homes; I remain unconvinced and many other people are deeply skeptical. In the most terribly polluted parts of the world, I suspect health data is unreliable, so I'll go with air pollution. No reasonable person would question that asbestos greatly increases the risk in smokers. Lung scars (TB, histoplasma, sclerosis) have an unknown impact. Read more...

Can lung cancer cause symptoms similar to the common cold or flu?

Not really. Lung Cancer will not cause running nose or sore throat. But it often does cause cough which is persistent(>3 weeks) and progressive. Chest pain and or shortness of breath can also be a symptom of Lung cancer. Read more...

As a doctor do you feel that tobacco is the main cause of lung cancer, or is it the chemicals big companies pt, or is there not enough research?

Tobacco is toxic. The tobacco is the main cause of the cancers. It is carcinogenic. Read more...
Lung Cancer. There is no question that lung cancer is more common in smokers. Smoking is considered the #1 risk factor. However, as many as 1 out of 3 lung cancer victims are non-smokers. Exposure to asbestos, radium or other toxic chemicals can contribute to lung cancer. Lung cancer is the most common cause of cancer deaths among men and women in the US. Thanks for trusting HealthTap! Read more...
YES, But not because of the nicotine that gets you hooked, but from all the other components such as the tar and the heat of the smoke is also a factor. Do non- smokers get lung cancer, yes they do but not in the high numbers we see from first hand and second hand smoke from tobacco. The only chemical that has been a cause for concern is the addition of extra nitcotine in the tobacco, but can't prove. Read more...
Not sure. No one can really attribute how much harm comes from the tobacco leaf vs the paper vs the chemicals added but all three are burned and inhaled and lead to disease. Read more...

Could car fumes cause lung cancer?

Not likely. The vast majority of lung cancer is caused by smoking - i.e. First hand cigarette smoke. Lung cancer is rare in people who have never smoked. If car exhaust were an important contributor we'd see far more cancer in people who had never smoked. Read more...
Watchout liver . Car fumes are detoxed by liver so keep detoxing your liver if u work in a field that involves inhaling car fumes a lot. Read more...
Any hydrocarbon can. ...Cause lung cancer. Any hydrocarbon combustion product, including car exhaust, will have carcinogens in it, but the volume and intensity of exposure, as well as the duration of exposure is several orders of magnitude less than that of a person who intentionally inhales cig smok for 20+ years, even if you live next to a busy street. Best advice? Don't smoke, and don't suck on a tialpipe. Read more...
Car fumes & cancer. Research has shown there is an epidemic of illnesses that are exacerbated by exhaust from vehicles, including cardiovascular disease, asthma, chronic obstructive pulmonary disease (COPD), and lung cancer. Read more...

What is lung cancer caused by in nonsmoker?

Possibly genetic,etc. Nonsmokers account for 15% of lung cancer cases, and these cases are often due to a combination of genetic factors, radon gas, asbestos, and air pollution including secondhand smoke. Asbestos can also cause mesothelioma, a cancer of the pleura or lining on the surface of the lungand diaphragm. The main type of lung cancer in nonsmokers is adenocarcinoma, particularly bronchoalveolar carcinoma. Read more...
Many things. >80% of lung cancer is caused by smoking. However never smokers (defined as <100 cigarettes in lifetime) can get smoking. Risk factors include radon exposure, second hand smoke, and genetic mutations such as egfr activating mutations. Read more...

What are the common symptoms of lung cancer?

Cough. The most common symptom of identified lung cancer is cough, followed by chest pain, shortness of breath, weight loss, followed by other constitutional findings. Read more...

What are the common symptoms of lung cancer?

Depends. Often none initially. Symptoms can include chest pain, arm pain or numbness, fatigue, weight loss, coughing, coughing up blood or mucous, shortness of breath, hoarseness. Read more...
From nothing. To terminal. Early on, no symptoms. May be identified on x-ray or ct for something independent. Cough hemoptysis- coughing blood pain in apex or chest wall shortness of breath. Progress from tiny, to small stage 1, to local spread to lymph nodes, to spread with distant metastasis stage 4. Read more...