About-cancer/understanding/zh

了解癌症

癌症不是一种疾病，而是几乎可以在身体任何地方发生的一系列相关疾病。 从根本上讲，癌症是我们人体细胞中的基因疾病。 基因控制着我们细胞的工作方式。 但是，这些基因的改变会导致细胞功能失常，导致它们在不应该生长或分裂时生长或分裂，或者阻止它们在应有的情况下死亡。 这些异常细胞可以变成癌症。

了解遗传变化如何导致癌症是了解这种疾病的一种方法，而癌症统计则是另一种方法。 癌症统计数据有助于科学家了解癌症对社会的负担。 统计数据可以告诉我们诸如每年有多少人被诊断为癌症或死于癌症，以及在癌症诊断后仍存活的人数。 统计数据随时间的变化可以帮助科学家找到需要进步的领域。

Cancer statistics also help scientists understand cancer health disparities. Examples of disparities include the higher cancer death rates, less frequent use of proven screening tests, and higher rates of advanced cancer diagnoses that are found in certain groups of people.

	What Is Cancer? Understand how cancer cells differ from normal cells and genetics changes that cause cancer to grow and spread.
	Cancer Statistics Basic information about cancer statistics in the U.S. and how they are used to understand the impact of cancer on society and to develop strategies that address the challenges that cancer poses.
	Cancer Disparities Certain groups bear an unequal burden of cancer. Learn about the factors that contribute to cancer disparities and find examples of disparities in incidence and mortality among certain populations.