Former " Friends" actor James Michael Tyler has announced that he has stage 4 prostate cancer.

前《老友记》演员詹姆斯·迈克尔·泰勒宣布自已患4期前列腺癌。

Typically, when there's a prostate cancer it's considered malignant, meaning that the tumor cells can metastasize, or invade and destroy surrounding tissues as well as tissues throughout the body.

前列腺癌通常都是恶性的，意味着肿瘤细胞可以转移，侵犯并破坏附近组织以及全身的远隔组织。

These typically arise from other cell types in the prostate, for example, transitional cell carcinoma arises from cells in the transitional zone, and small cell prostate cancer arises from neuroendocrine cells.

它们一般起源于其他类型的前列腺细胞，例如移行细胞癌起源于移行带，前列腺小细胞癌起源于神经内分泌细胞。

In the US, it claims more lives annually than colorectal cancer, breast cancer, prostate cancer, influenza, pneumonia, auto accidents, HIV, firearms, and house fires combined.

在美国，它每年夺去的生命比结肠直肠癌、乳腺癌、前列腺癌、流感、肺炎、车祸、艾滋病毒、枪支和房屋火灾的总和还要多。