Introduction

Lung cancer is a disease of uncontrolled growth in the tissues of the lung. And 'one of the most frequent cancers in the United States, representing about 15 percent of all cases, or 170,000 new cases each year. It is also the worst cancer killer in America, taking more lives each year than breast, prostate and colon cancer combined, according to the American Cancer Society. And 'the leading cause of cancer deaths in the United States womenand is responsible for the number of deaths from breast cancer and all gynecological cancers combined.

Smoking

Smoke, radon and passive smoking are the main causes. Smoking causes approximately 160.000 dead * in the United States. Smoking causes 85 percent to 90 percent of all cases of lung cancer. Smoking affects non-smokers from smoking by giving them new and used. When a person stops smoking, this chance decreases steadily as the damage is repaired in the lung and the particles of dirt are graduallyremoved.

Radon

Radon is a colorless, odorless gas, through the radioactive decay of radium, which in turn found the decay product of uranium in the crust has generated. Radon is the leading cause of lung cancer in nonsmokers, according to EPA estimates. Radon causes 15,000 to 22,000 deaths annually in the United States – 12 percent of deaths from lung cancer are linked to radon.

Risk

Risk factors are: smokingCigarettes or cigars, now or in the past. Not all cases are caused by smoking, but the role of passive smoking is increasingly recognized as a risk that policy interventions to reduce unwanted exposure of nonsmokers to tobacco smoke of others. A smoker who has also exposed to radon, a much higher risk. The more cigarettes smoked per day and the first one starts smoking, the greater the risk of lung cancer. High levels of pollution, radiation and asbestosExposure may also at increased risk.

Symptoms

Symptoms: chronic cough, hoarseness, coughing up blood, weight loss and loss of appetite, shortness of breath, fever for no apparent reason, wheezing, repeated attacks of bronchitis or pneumonia and chest pain. Approximately 10% of people have no symptoms at diagnosis, these tumors are also found on routine chest X-ray. In fact, lung cancer can spread outside the lung, without Symptoms.

Treatment

Treatment depends on the type of cancer cell specific, since it is widespread, and performance status of the patient. It also depends on the stage, or as it is advanced. Choice of treatment will be discussed with a doctor. It may include chemotherapy, radiotherapy and surgery. In recent years, various molecular targeted therapies have been developed as treatments.

Conclusion

Lung cancer is the second most frequent form ofCancer in most Western countries, and is the main killer of tumors. And 'the most common cause of cancer death in men and women, almost one third of cancer deaths annually in the United States. Was the subject of numerous investigations. Although the mortality rate of men, no longer exist in western countries, is almost always for women due to the increased takeup of smoking by this group. We haveI know that the best way to ensure that stop smoking (smoking or not start). Three to five years after quitting, the risk of disease is reduced by half.

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