化学致癌物，例如石棉、烟草烟雾成分、酒精、黄曲霉毒素（一种食品污染物）和砷（一种饮水污染物）；出生后发生的基因突变。大多数基因突变会在您出生后发生，并且不会被遗传。有多种因素会导致基因突变，例如抽烟、辐射、病毒、致癌化学物质（致癌物�

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