Borderline Ovarian Serous Tumor/Atypical Proliferative Ovarian Serous Tumor

**Semantic type:** Neoplastic Process

**Definition:** A non-invasive serous neoplasm that arises from the ovary and shows greater cellular proliferation and cytologic atypia as compared to benign ovarian serous tumors, but less as compared to low-grade ovarian serous carcinoma.

**Synonyms:** - SBT/APST