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。

Understanding how genetic changes cause cancer is one way to understand this disease, while cancer statistics is another. Cancer statistics help scientists understand the burden of cancer on society. Statistics can tell us things such as how many people are diagnosed with and die from cancer each year and the number of people who are living after a cancer diagnosis. Changes in statistics over time can help scientists find areas where progress is needed.

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.