企业医疗单位由于劳保医疗制度规定，员工家属必须到指定医疗机构就医．就医方便，出现症状后即能进一步诊疗，因此肿瘤早期病情比较容易发现。对及时治疗与定期随访，也均显示其优越性。上海铁路局属国家大型企业，设有医院18所、卫生所与保健站200余所，形成覆盖面较大的医疗 Corporate medical units are required to go to designated medical institutions for medical treatment due to the labor insurance medical system regulations. With convenient medical treatment, it can be further diagnosed and treated after symptoms appear. Therefore, the condition of the tumor in the early stage is relatively easy to find. The timely treatment and regular follow-up also showed its superiority. The Shanghai Railway Administration is a national large-scale enterprise with more than 200 hospitals, more than 200 health centers and health stations, forming a large coverage of medical care.