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

有很少的分裂象，无异型性及纤维组织增生。

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.

是纤维，你该象纤维卵一样，需要认真地观察核分裂和细胞异型性以判断是否为恶性，卵巢恶性纤维性肿非常少见。