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现代医学科学的进展,揭示了环境致癌因素正在与日俱增,因此必须提出相应的予防措施。环境原因引起的癌症,它的原型就是职业性癌。职业性癌是由于在非偶然性的职业活动(作为非偶然性的工作环境的一部分)期间接触特殊的化学、物理和生物致癌因素所引起的,没有这些致癌因素的参与,这些癌症就不会发展。因此,在发生上的流行病学特点和“某些非特异性损伤后所致的创伤癌”不同。暴露在某种已知的职业性致癌因素下的工人,如给予足够的暴露条件,则我们可以对他们发生肿瘤的频数、部位、类型、作出十分确切的予言。癌变过程局部所出现的某些特殊症状(对某些职业性致癌因素来说,如有意义的暴露白斑)常先于或伴随着癌症出现。
The progress of modern medical science has revealed that environmental carcinogens are increasing day by day. Therefore, corresponding preventive measures must be put forward. Environmental causes of cancer, its prototype is occupational cancer. Occupational cancer is caused by exposure to specific chemical, physical and biological carcinogenic factors during non-incidental occupational activities (as part of an occasional work environment) that do not develop without such carcinogenic factors. Therefore, the epidemiological characteristics of occurrence are different from “wound cancer caused by some non-specific damage”. Workers exposed to a known occupational carcinogen, if given adequate exposure conditions, can make very precise remarks about the frequency, location, type of tumors they develop. Some of the specific symptoms that appear locally in the canceration process (such as significant exposure to white matter for certain occupational carcinogens) often precede or accompany the appearance of cancer.