Next, the cancer can invade nearby tissues like the pectoral muscles below and the skin above.

其次，癌症可以侵袭附近组织，如其下的胸肌和其上的皮肤。

If it is not able to invade other tissues, it's referred to as a benign tumor.

如果其不能侵入其他组织，那么就称之为良性肿瘤。

But some become malignant tumors or cancers, and these are the ones that break through their basement membrane and invade nearby tissues.

但有些变成了恶性肿瘤细胞，即癌细胞：它们穿破基底膜，侵犯邻近组织。

In most cancers, this can result in lumps, or tumors, that invade nearby tissue.

在大多数癌症中，这可能导致侵入附近组织的肿块或肿瘤。

So eventually, these mutations might make the cells malignant - meaning they gain the ability to invade neighboring tissues and spread to distant sites.

长此以往，这些突变可能最终使细胞具有了恶性，恶性指具备侵犯周围组织和转移到身体远处的能力。

That's because the rapidly dividing cells can develop additional mutations that eventually make these growths expand beyond the basement membrane and invade neighboring tissues.

这是因为快速分裂的细胞极易发生突变，最终浸润超过基膜，侵入周围组织。

However, some mutations allow cancerous cells to grow unchecked and invade nearby tissues, or even metastasize to distant organs.

然而，一些突变允许癌细胞不受控制地生长并侵入附近的组织，甚至转移到远处的器官。

Other cancer cells are able to invade normal tissue, enter the bloodstream, and metastasize to a remote site in the body.

其他癌细胞能够侵入正常组织，进入血液，并转移到体内的远端部位。

The malignant cells then invade surrounding tissues like the salivary glands, muscle, and even get into the blood and lymphatic systems, and metastasize, or travel, to other areas of the body.

随后，这些恶性肿瘤细胞会侵袭邻近组织，如唾液腺、肌肉，甚至还能进入血液和淋巴系统，而后转移到身体的其它部位。

If the cell growth has the potential to spread to and invade other tissues, called metastasis, it's known as a malignant tumor, and is also more commonly known as a cancer.

如果肿瘤细胞有扩散并侵入其他组织（即转移）的潜能，则被认为恶性肿瘤，通常也被称为癌症。

The cells lining the colon and rectum are constantly dividing, and typically when there's an overgrowth of tissue it's benign, but some can become malignant, meaning that the dividing cells can start invading nearby tissues over time.

排列在结肠、直肠上的细胞不断分裂，通常增生物都是良性的，但有恶变可能，即这些分裂活跃的细胞可能逐渐开始侵犯周围组织。

There are two general types of tumors: benign tumors and malignant tumors. A benign tumor is composed of cells that will not invade other unrelated tissues or organs of the body, although it may continue to grow in size abnormally.

良性肿瘤和恶性肿瘤。尽管良性肿瘤可能会继续异常地体积增大，但他不会侵袭身体其他无关组织或器官的细胞组成。