Epithelial ovarian cancers can be subdivided into four types: serous, mucinous, endometrioid and transitional.

上皮性卵巢癌被再细分成四种类型：分别是浆液性、黏液性、内膜样和变移性肿瘤。

Benign endometrioid tumors often have cysts filled with dark blood, so although these are called endometriomas, they are sometimes referred to as chocolate cysts.

良性子宫内膜性肿瘤经常伴随着充满暗血的囊肿，所以尽管被称作子宫内膜异位瘤，它们也常被称为巧克力囊肿。

Rarely, endometrioid tumors can be malignant, and the endometrium-like cells can spread out to other areas including the fallopian tubes and the peritoneal cavity.

子宫内膜样肿瘤也可以是恶性的，且子宫内膜样细胞可以转移到其他部位，包括输卵管和腹腔。

The most common is Type 1 endometrial carcinoma, which is also called endometrioid carcinoma because the tumours grow in a way that looks like normal endometrial glands.

最常见的是I型子宫内膜癌，又称为子宫内膜样腺癌，因肿瘤的生长方式与正常的内膜腺体相似而得名。

Next are endometrioid tumors which come from endometrium-like cells which is ectopic, meaning they're out of place, because those sorts of cells are usually found in the endometrium.

接下来是子宫内膜样肿瘤，来自出现异位的子宫内膜样的细胞，意思是它们并没有待在原位，因为那类细胞经常在子宫内膜上被找到。

Serous and mucinous tumors arise from epithelial cells that line the outside of ovaries, whereas even though the tumors are found in the epithelium, the endometrioid and transitional cell tumors arise from other cell types.

浆液性和黏液性肿瘤是由卵巢外侧上皮细胞癌变引起的，而虽然这两种癌症都来自上皮的癌变，内膜样和移行性肿瘤却来自其他类型的细胞。