肺癌的原因都有哪些
肺癌是一种致命的疾病,它是指在肺组织中形成恶性肿瘤。肺癌是全球范围内最常见的癌症之一,其原因复杂多样。以下是肺癌可能的一些原因:
1.吸烟:吸烟是肺癌的主要风险因素。烟草燃烧产生的化学物质,如尼古丁和焦油,会对肺部组织产生直接的损害和刺激。研究表明,吸烟者罹患肺癌的风险是非吸烟者的20多倍。
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