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肺癌是肺内的异常细胞在肺中无控制地生长,继而形成肿块并破坏正常的肺组织细胞而最终影响到肺功能的一种疾病。肺癌有两种主要的类型:非小细胞肺癌(如腺癌、鳞癌和支气管肺泡细胞癌等)和小细胞肺癌。前者约占85%,后者约占15%。一旦癌肿在肺内发展起来,它们可以沿着血液和淋巴流向身体的其他部位并就地长大起来,称为肺癌的转移,如脑转移、骨转移和肝转移
Lung cancer is a disease in which abnormal cells in the lungs grow uncontrolled in the lungs, which then form masses and destroy normal lung tissue cells, ultimately affecting lung function. There are two main types of lung cancer: non-small cell lung cancer (such as adenocarcinoma, squamous cell carcinoma, and bronchoalveolar cell carcinoma, etc.) and small cell lung cancer. The former accounts for about 85% and the latter about 15%. Once cancerous tumors develop in the lungs, they can flow along blood and lymph flow to other parts of the body and grow up in situ, known as lung cancer metastases such as brain metastases, bone metastases, and liver metastases.