Finally, the last category of neoplastic cysts include malignant ovarian tumours, like serous or mucinous cystadenocarcinomas, which develop from surface ovarian epithelium, just like their benign counterparts.

最后一肿为卵巢恶肿瘤，浆液或黏液腺癌，和良腺瘤相似，它们也由表面卵巢上皮形成。