About-cancer/understanding/zh

了解癌症

癌症不是一種疾病，而是幾乎可以在身體任何地方發生的一系列相關疾病。 從根本上講，癌症是我們人體細胞中的基因疾病。 基因控制着我們細胞的工作方式。 但是，這些基因的改變會導致細胞功能失常，導致它們在不應該生長或分裂時生長或分裂，或者阻止它們在應有的情況下死亡。 這些異常細胞可以變成癌症。

了解遺傳變化如何導致癌症是了解這種疾病的一種方法，而癌症統計則是另一種方法。 癌症統計數據有助於科學家了解癌症對社會的負擔。 統計數據可以告訴我們諸如每年有多少人被診斷為癌症或死於癌症，以及在癌症診斷後仍存活的人數。 統計數據隨時間的變化可以幫助科學家找到需要進步的領域。

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.