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肺癌是常见恶性肿瘤之一,发病率有逐步上升的趋势。国内上海统计,1960年肺癌发病率占恶性肿瘤的第六位,1970年跃居第二位。美国1975年统计,男性肺癌发病率占恶性肿瘤的第一位(约22%)。肺癌起病较隐匿,早期诊断比较困难,发展迅速,预后亦不佳。未经治疗的肺癌患者大多在一年内死亡,很少超过一年半。据统计,约有一半以上(64%)的肺癌病人,平
Lung cancer is one of the common malignant tumors, and the incidence rate has gradually increased. According to domestic statistics in Shanghai, the incidence of lung cancer accounted for the sixth place among malignant tumors in 1960 and ranked second in 1970. In the United States in 1975, the incidence of male lung cancer accounted for the first (about 22%) of malignant tumors. The onset of lung cancer is more hidden, early diagnosis is more difficult, rapid development, and poor prognosis. Most untreated lung cancer patients die within one year, rarely exceeding one and a half years. According to statistics, about half (64%) of lung cancer patients are flat.