THE PREVENTION OF LUNG CANCER-Applications of Some Current Theories.

The rapid increase in the incidence of bronchogenic carcinoma, the difficulties in early diagnosis and the infrequency of successful treatment emphasize the importance of attempts at its prevention. Much has been learned regarding the role of a variety of environmental factors in the genesis of this disease, although further studies are to be desired. The complete elimination of exposures to excessive irradiation or the inhalation of radioactive substances, to inorganic, organic or animate particles which may be responsible for chronic pulmonary diseases, and especially to automobile exhaust and cigarette smoke, occupational irritating or carcinogenic air pollutants and other predisposing conditions may require extensive changes in industry, government and society. A number of practical personal precautions are available, however, which may greatly reduce the hazard for the individual observing them.