原发性肺癌至今仍是男性癌瘤死亡率最高的疾病。其特点有下列几个方面: 1.发病率最近美国廿年来肺癌发病率增多两倍,和欧州相似:1968年六万人患病。1980年则有10万,男女之比为9.1,所以男性为主。吸烟因素:每天吸1—l0支纸烟者,患癌率为5％,每日吸烟20支者,患癌率为30％。一万居民中有60个男性肺癌,而十万居民中有10个消化道癌,故肺癌比消化道癌常见。 2.肺癌的极大严重性,死亡率最高,患者一年内死亡80％。 Primary lung cancer is still the highest death rate among male cancers. Its characteristics include the following aspects: 1. Incidence of disease The incidence of lung cancer has recently tripled in the United States in recent years, similar to that in Europe: 60,000 people became ill in 1968. In 1980, there were 100,000, the ratio of men and women was 9.1, so the male dominated. Smoking factors: 1-10 cigarette smokers per day, the cancer rate is 5%, and 20 cigarettes per day, the cancer rate is 30%. Of the 10,000 inhabitants, 60 males have lung cancer, and of the 100,000 inhabitants, 10 have digestive tract cancer. Therefore, lung cancer is more common than gastrointestinal cancer. 2. The great severity of lung cancer, the highest mortality, the patient died 80% within one year.