Borderline Ovarian Endometrioid Tumor/Atypical Proliferative Ovarian Endometrioid Tumor with Microinvasion

**Semantic type:** Neoplastic Process

**Definition:** A low grade ovarian epithelial neoplasm characterized by the presence of glandular or cystic spaces which contain atypical glandular epithelial cells resembling endometrial cells. Microinvasion of the ovarian stroma is present.