Here's the list of proven causes of carcinoma in the lungs:
Smoking is a lifestyle-related factor. According to NCI, smoking those cigarettes causes 87% of cases of tumor in the lungs. Tobacco contains over 60 carcinogenic chemicals like tar, benzene, arsenic and lead.
Exposure to effects of second hand smoking increases risk for diseases and carcinoma in the lungs by 24% among non smokers. The lungs of children and the elderly are the most vulnerable to second hand smoke.
If you smoke, consider quitting to help prevent damage to your family's lungs.
Asbestos is a known highly toxic chemical that causes diseases and scarring in your lungs.
Exposure to asbestos fiber increases your risk for the carcinoma by 5 times more. If you smoke, your risk goes up further. Your risk is 50 to 90 times higher. Other chemicals include chromium, nickel and arsenic.
One of the causes of carcinoma in the lungs of the elderly is aging. As you grow old, your cells become weak against abnormalities and mutations. Most diagnoses of carcinoma of the lungs are among individuals 65 years old and above who smoked during their younger years.
Heredity is surprisingly another one of the causes that can trigger lung carcinoma. Having a parent or a sibling who died of the disease increases your risk of developing it regardless of whether you smoke or not. If you smoke, it becomes worse.
Alcohol is not directly associated with lung carcinoma but the dangers of alcohol can aggravate and enhance the cancerous effects of tobacco.
8. Air pollution
Polluted air is also believed to be what causes carcinoma of the lungs. It increases your risk similar to that of a passive smoker.
9. Lung diseases
Example of a disease in the lungs that increases your risk for carcinoma to 4 to 5 times more than that of a non smoker is Chronic Obstructive Pulmonary Disorder or COPD. It is one of the diseases caused by smoking and one of the side effects of lung cancer.
10. High-fat diet
An unhealthy diet makes you more susceptible to colon and breast cancers. But the kind of food that you eat is also one of the causes of lung cancer.