There is minimal mitotic activity, no atypia and no desmoplasia.

有少的分裂象，无异及纤维组织增生。

If it is a fibromatous tumor, you need to check mitosis and cytologic atypia carefully to see if it is malignant, like fibrothecoma.Malignant fibrous tumor is very few in ovary.

如果它是纤维瘤，你该象纤维卵泡膜瘤一样，需要认真地观察核分裂和细胞异判断它是否为恶，卵巢恶纤维肿瘤非常少见。