Today, although the efforts of the ambientalistas, the majority of the industries polui air, as well as vehicles that they free in the atmosphere many you substantiate harmful to the environment, and desmedida greed of the man in devastar the forests. The lung cancer is the most common of all malignant tumors. In 90% of the diagnosised cases, it is associated with the consumption of TOBACCO derivatives, therefore, it is an illness EVITVEL. In Brazil, the lung cancer was responsible for 16.230 deaths in 2003 (INCA), being the type of cancer that more made victims. In 2008 it had in Brazil an incidence of 27.270 new cases. But the case is more preoccupying when we lead in account that the passive smokers, that is, the not smoking ones who coexist people who smoke, also tend to the cancer. Of each 20 passive smokers, 1 will have cancer. The deaths for cancer of lung due to the tobaccoism surprise, that is, 90% they are men and 75% are women.

The lung cancer, of the anatomo-pathological point of view, is classified in two main types: 1) Small cells CPCP/20% of casos=> they present one worse prognostic with one high metasttico potential and 2) Not-small clulas/CNPCP/80% of casos=> as the carcinoma that is an epithelial malignant tumor or to glandular that it tends to invade surrounding fabrics, originating metstase, that is, is the skin cancer not melanoma.DIAGNSTICO The symptoms most common of the lung cancer are the air cough, lack, loss of the appetite, emagrecimento saliva or escarro with blood. Moreover, pains in the chest or the bones can occur a repetition pneumonia can, also, be the initial presentation of the illness. The way most easy to diagnosis the lung cancer is through a ray-x of the thorax complemented for a computerized cat scan. A gotten time the confirmation of the illness, is carried through ESTADIAMENTO (TNM) that it evaluates the period of training of evolution, that is, verifies if the illness is restricted to the lung or spread by other agencies (metstase), as for example crebro.FATORES OF RISCOIndependentemente of the cellular type, the TOBACCOISM it is the main factor of risk of the pulmonary cancer.