Low-grade serous ovarian carcinoma: A retrospective study on 34 complete cytoreductive surgeries

Aim of the study: Low-grade serous ovarian cancer is a distinct, slow-growing entity that affects mainly young women. The objective of this study was to describe the clinical characterisitics and survival outcomes of a population of patients suffering from advanced stage CSBG. Patients and methods: A retrospective study was carried out in patients with advanced stage ovarian CSBG (FIGO IIIb-IV) who had complete macroscopic cytoreductive surgery, at Gustave Roussy Institut, Villejuif, between 2004 and 2017. Results: Thirty-four patients were included, who were mainly young women (mean age 41.3 years), diagnosed at FIGO stage IIIC (91 %). The median follow-up was 41 months. Neoadjuvant chemotherapy was administered in 16 patients (47.1 %), and complete response never occurred. Upper abdominal surgical procedures were necessary in 90 % of cases and a bowel resection was performed in more than 80 % of cases. Over 90 % of patients received adjuvant chemotherapy followed by maintenance treatment with bevacizumab in over 40 % of cases. During follow-up, 9 (26 %) deaths occurred. Five-year overall survival was 70 % and disease-free survival was 20 %. Conclusion: CSBG of the ovary has a low chemosensitivity and requires maximum surgical management, which should be performed in expert centers.