它的生长速度得非常缓慢，每年生长约15毫米。

It grows very slowly, nearly 15mm per year.

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“前列腺癌是一种缓慢生长的癌症，如果你可以让它减慢，进一步，您可以把它从一个致命的状态下变成一种可管理的慢性的状态，”他说。

"Prostate cancer is a slow growing cancer and if you can slow it down even further you can turn it from a fatal condition to a chronic one that can be managed," he said.

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听神经瘤是一种非癌性(良性)并且通常生长缓慢的肿瘤，它发生在从内耳到大脑的主神经上。

Acoustic neuroma is a noncancerous (benign) and usually slow-growing tumor that develops on the main nerve leading from your inner ear to your brain.

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