Abstract
The significance of the lung cancer as a medical problem is determined by its unfavorable epidemiological characteristics. Lung cancer and prostate cancers are both most frequent neoplasms among men, whereas in women it takes third or fourth position. However this neoplasm is most lethal, with highest mortality rate, that exceeds mortality rate of prostate, breast and colon cancer in both sexes. The reason for that is its late diagnosis. The tendencies of the changes of lung cancer prevalence and mortality are strongly dependant on the main causative factor - smoking. Decrease in the prevalence of the disease in men, but not in women is the result of smoking restrictions worldwide. In conclusion, the importance of lung cancer is determined by its high prevalence and mortality rate. The only efficient tool for limitation of the disease is fighting smoking.
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