Efficacy of hyperthermic intraperitoneal chemotherapy in patients with epithelial ovarian cancer: a meta-analysis

Objective: The role of hyperthermic intraperitoneal chemotherapy (HIPEC) in epithelial ovarian cancer (EOC) is still controversial. Present analysis aims to evaluate the survival benefit of HIPEC in treatment of EOC patients. Methods: Articles related to 'HIPEC' and 'ovarian cancer' were comprehensively searched in four databases (PubMed, EMBASE, MEDLINE and Cochrane Library) up to 4 February 2018. Eligible studies were identified depending on the selection criteria. The survival outcome and adverse events were collected. The relationship between HIPEC and survival of EOC was assessed using random-effects models. Results: A total of 1464 patients from 17 trials were subjected to analysis. The pooled results showed that HIPEC significantly improved overall survival (OS, HR = 0.50, 95% CI 0.36-0.69; p = 0.000) and progression-free survival (PFS, HR = 0.57, 95% CI 0.47-0.69; p = 0.000) among EOC patients when compared with no HIPEC controls. Similar results were observed in each year rate of survival. Subgroup analysis didn't lead to the opposite results, except no significant increased 1-year of OS in primary EOC and 1- and 2-year of PFS in recurrent EOC treated with HIPEC were observed. No significant difference existed in the adverse events and mortality between HIPEC and no HIPEC. Conclusions: HIPEC is associated with improved OS and PFS in both primary and recurrent EOC. However, no significant increased 1- and 2-year of PFS were reached in recurrent EOC treated with HIPEC. Further prospective randomized controlled trials are warranted.