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

有很少的分裂象，无异型性及织增生。

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.

如果它是瘤，你该象卵泡膜瘤一样，需地观察核分裂和细胞异型性以判断它是否为恶性，卵巢恶性性肿瘤非常少见。