About cigarettes and cancer of lung

Frankly speaking, people may have the highest degree of awareness of the co-relation of cigarettes and cancer of lung as a major causation to cancer, comparing to the vague idea on carcinogenic food substances.

Cigarettes are the main factor for causing carcinomatosis, not only generating cancerous cells but also nourishing them to grow into uncontrollable and troublesome stuffs.

Besides, it is commonly believed that close relation exists between the compounds of phenol and growth of cancerous cells.

Anyhow, research is currently still in progress to ascertain the number of cigarettes and the years of smoking as a harmful cause to cancer for the habitual smokers.

Many research experts and scholars are of the same view that the critical factors are on the number of cigarettes taken each day and of the years of smoking.

For instance, in respect of long smoking pipes which are regarded as susceptible to cancer of lung, the number is:

(1) Number per day times years of smoking exceeding 400

(2) Long smoking pipes with above index more than 600 are susceptible to hilum pulmonis type
squamous epithelium carcinomatosis.

In another word, those having started smoking since their adolescence are more prone to the danger of cancer owing to the long age of smoking, which facts are supported by many statistical figures. (Please refer to Table 16 on "Ratio of standard death rate of cancer of lung to number of cigarettes smoked. In view of the increased popularity in worldwide campaigns in resisting second hand smoking, there is a  tendency in the decline in the number of smokers and the number of cigarettes smoked. In 1982, the ratios of smokers to nonsmokers in the total death rate of cancer were 2 to 1
for male and 1.3 to 1 for female. Investigations in recent years however revealed a slight decrease in the ratio for male of 1.6 to 1 (in contrast to the slight increase in the ratio of 1.36 to 1 for female).


It is established that smoking may easily cause carcinomatosis of the respiratory system, such as cancer of lung, larynhgocarcmoma, carcinoma of esophagus and so on. Recently in overseas countries, smokers causing cancer to neighboring nonsmokers who inhaled "secondhand smokes" are deemed to have committed "homicide". The close association between carcinomatosis and smoking is undeniable, and will be widely discussed from now on as a major social issue.

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