Lung cancer is the leading cause of cancer related deaths in men and the second common in women after breast cancer. Lung cancer kills nearly 158,000 more American people every year than breast, colon and prostate cancers combined.
Lung Cancer is the formation of malignant tumor through carcinogenesis, in the lungs which can than metastasize into other regions of the body.
Two main types of Lung Cancers
- • Small Cell Lung Cancer (SCLC)
- • Non-Small Cell Lung Cancer (NSCLC)
Small Cell Lung Cancer : SCLC accounts for only 15 percent of lung cases in America and tend to be more responsive to chemotherapy than non-small cell lung cancer. They also advance to the nest stage relatively faster than a NSCLC.
Non-Small Cell Lung Cancer : NSCLC accounts for the majority of lung cancers at 85 percent. It can be in the form of an adeno-carcinoma (the most common in US in both sexes), squamous cell carcinoma (accounts for 25 percent of the cases), and large cell carcinoma (accounts for 10 percent of the NSCLC tumors).
The biggest risk factor for lung cancer is smoking. That includes cigarettes, cigars, and pipes. Tobacco products contain thousands of toxic substances. According to the Centers for Disease Control and Prevention (CDC), cigarette smokers are 15 to 30 times more likely to get lung cancer than nonsmokers. The longer you smoke, the greater the risk. Quitting smoking can lower that risk.
Cigarette smoke contains more than 4,000 chemicals, many of which have been identified as causing cancer.
A person who smokes more than one pack of cigarettes per day has a 20-25 times greater risk of developing lung cancer than someone who has never smoked.
Cigar and pipe smoking increases the risk of lung cancer but not as much as smoking cigarettes.