Oncologic outcomes and morbidity following heated intraperitoneal chemotherapy at cytoreductive surgery for primary epithelial ovarian cancer: A systematic review and meta-analysis.

e17093 Background: Heated intraperitoneal chemotherapy (HIPEC) following cytoreductive surgery in the treatment of primary epithelial ovarian cancer (EOC) after neoadjuvant chemotherapy was associated with a significant 12 months improved overall survival (OS) in a well-designed randomized controlled trial. Nonetheless, there remains uncertainty about the benefit and safety of HIPEC in ovarian cancer. The aim of this review was to assess efficacy and safety of HIPEC in primary EOC. Methods: We conducted a systematic search in Medline, Embase, the Cochrane Central Register of Controlled Trials, and the Cochrane Database of Systematic Reviews, from inception to February 22nd 2018 for observational and randomized studies of patients with primary EOC undergoing HIPEC at cytoreductive surgery with no language restrictions . We assessed risk of bias with the Institute of Health Economics Quality Appraisal Checklist for single-arm studies, and Newcastle-Ottawa Quality Scale for double-arm studies. We determined the pooled proportion of 30-day grade 3-4 morbidity, reoperation, and postoperative death. Results: Thirty-five articles including 1937 patients with primary EOC met inclusion criteria. Timing of HIPEC and type of chemotherapy regimens were not consistent between studies. There was significant variation in the reported OS of patients treated with HIPEC at cytoreductive surgery for primary EOC (3-year OS:48-77%; 5-year OS:17-72%). Thirteen articles were including in a meta-analysis to determine to the safety of HIPEC. The pooled proportions for 30-day Grade 3-4 morbidity, 30-day reoperation, and 30-day postoperative death were 33.0% (95% CI 23.0-45.0), 9.0% (95% CI 5.0-17.0) and 3.0% (95% CI 1.0-5.0) respectively. Conclusions: The use of HIPEC in primary EOC is associated with significant morbidity. There is significant heterogeneity in current literature. Higher quality, large prospective randomized control trials are needed to further support the benefit of HIPEC at cytoreductive surgery in the first-line treatment of primary EOC.