Closely Related About Tobacco and Cancer

Tobacco is by far the most important cause of cancer in industrialized countries. When chewed, it can cause cancer of the mouth and esophagus, and when tobacco is smoked, is a leading cause of cancer of the mouth, pharynx, esophagus, larynx, lung, pancreas, bladder and renal pelvis. If these eight types of cancer epidemiological data indicate that smoking in the long term average number of cigarettes per day increases the risk of 3-20 times. It has also become clear that smoking causes a part of several other types of cancer, the increasing prevalence of up to two times the Non-Smoking: feed lips, nose, nasopharynx, stomach, liver, kidneys, and myeloid leukemia . Although the relative increase is not large, the consistency of results across countries, evidence of dose-response, a lower mortality rate in ex-smokers than smokers have continued to strengthen the relationship between these cancers and tobacco.

In summary, smoking is estimated to have caused 30 percent of cancer deaths in the United Kingdom in 2005, 34 percent 20 years ago. The reduction was significant in men (52 percent vs. 40 percent), but was more than offset by the increase among women (12 to 20 percent). In men, there were decreases in some developed countries but increasing in others, particularly in Central and Eastern Europe. In women, the proportion of cancer deaths attributed to the consumption of snuff was generally low in 1985, but increased in all developed countries and is expected to increase.

Tobacco-related cancers is lower in countries like France, where very few women of middle age or older had smoked for a long time to produce a material effect. In developing countries, the effects of smoking has only recently begun to be studied systematically, and it is still very uncertain. In general, women in developing countries do not smoke or do not smoke very little. In men, however, there has been a huge increase in cigarette consumption, the full impact has yet to materialize. China, with 20 percent of the world population who smoke cigarettes by 30 percent worldwide, and in 2000 smoking was already responsible for about 20 percent of cancer deaths for men in China.

In India, many men were smoking "bidis" (small house cigarettes) for decades. The proportion of cancer incidence may be even greater. This is mainly because in India there is a widespread habit of chewing betel quid containing and tobacco. Smoking can act as an aggravating factor in the cause of cancers of the mouth, esophagus or stomach in those who habitually chew quid eg containing betel and tobacco. In parts of South America, is the male rate of lung cancer with smoking are already higher than in developed countries. Overall, tobacco causes almost as many cancer deaths in developing countries than in developed countries. In general, tobacco is responsible for about 20 percent of all cancer deaths worldwide.