lung cancer

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respiration and respiratory systems lung cancer up to the time of world war ii, cancer of the lung was a relatively rare condition. the increase in its incidence in europe afterworld war ii was at first ascribed to better diagnostic methods, but by 1956 it had become clear that the rate of increase wastoo great to be accounted for in this way. at that time the first epidemiological studies began to indicate that a long history ofcigarette smoking was associated with a great increase in risk of death from lung cancer. by 1965 cancer of the lung andbronchus accounted for 43 percent of all cancers in the united states in men, an incidence nearly three times greater than thatof the second most common cancer (of the prostate gland) in men, which accounted for 16.7 percent of cancers. the 1964report of the advisory committee to the surgeon general of the public …

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reases the risk of lung cancer due to inhalation of radondaughters (products of the radioactive decay of radon gas), and possibly also increases the risk of lung cancer due to arsenicexposure. cigarette smoke may be a promoter rather than an initiator of lung cancer, but this question cannot be resolved untilthe process of cancer formation is better understood. recent data suggest that those who do not smoke but who live or workwith smokers and who therefore are exposed to environmental tobacco smoke may be at increased risk for lung cancer,eloquent testimony to the power of cigarettes to induce or promote the disease. because lung cancer is caused by different types of tumour, because it may be located in different parts of the lung, andbecause it may spread beyond the lungs at an early stage, the first symptoms noted by the patient vary from blood staining ofthe sputum, to a pneumonia …

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s been turned to prevention byevery means possible. foremost among them are efforts to inform the public of the risk and to limit the advertising ofcigarettes. steps have been taken to reduce asbestos exposure, both in the workplace and in public and private buildings, andto control air pollution. the contribution of air pollution to the incidence of lung cancer is not known with certainty, thoughthere is clearly an "urban" factor involved. persons exposed to radon daughters are at risk for lung cancer. the hazard from exposure was formerly thought to beconfined to uranium miners, who, by virtue of their work underground, encounter high levels of these radioactive materials.however, significant levels of radon daughters have been detected in houses built over natural sources, and with increasinglyefficient insulation of houses, radon daughters may reach concentrations high enough to place the occupants at risk for lungcancer. a recent survey of houses in the …

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respiration and respiratory systems lung cancer up to the time of world war ii, cancer of the lung was a relatively rare condition. the increase in its incidence in europe afterworld war ii was at first ascribed to better diagnostic methods, but by 1956 it had become clear that the rate of increase wastoo great to be accounted for in this way. at that time the first epidemiological studies began to indicate that a long history ofcigarette smoking was associated with a great increase in risk of death from lung cancer. by 1965 cancer of the lung andbronchus accounted for 43 percent of all cancers in the united states in men, an incidence nearly three times greater than thatof the …

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