角质是一种硬纤维蛋白，在头发和指甲中都存在。

Keratin is a tough, fibrous protein found in hair and nails.

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图示：卵巢间质瘤，又硬又白，属纤维瘤。

Here is an ovarian stromal tumor that is hard and white and is a fibroma.

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卵巢间质瘤，又硬又白，属纤维瘤。

Here is an ovarian stromal tumor that is hard and white and is a fibroma.

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卵巢间质瘤，又硬又白，属纤维瘤。

Here is an ovarian stromal tumor that is hard and white and is a fibroma.

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