Cytoreductive Surgery (CRS) Plus Hyperthermic Intraperitoneal Chemotherapy (HIPEC) vs CRS Alone for Treatment of Endometrial Cancer with Peritoneal Metastases: A Multi-Institutional Study from PSOGI and BIG RENAPE Groups

Objective: To investigate the benefit of cytoreductive surgery (CRS) combined with hyperthermic intraperitoneal chemotherapy (HIPEC) for the treatment of endometrial peritoneal carcinomatosis compared to CRS alone.MethodsWe conducted a retrospective multicentre study of patients from experienced centres in treating peritoneal malignancies from 2002 to 2015. Patients who underwent surgery for peritoneal evolution of endometrial cancer (EC) where included. Two groups of 30 women were matched and compared: “CRS +HIPEC” which used HIPEC after CRS, and “CRS only” which did not used HIPEC. We analysed clinical, pathologic and treatment data for patients with peritoneal metastases from EC. The outcome measures were morbidity, overall survival (OS), and progression-free survival (PFS).ResultsIn “CRS plus HIPEC” group, 96,7% of women were treated for recurrence, while in “CRS only” 83,3 were treated for primary disease. There was no significant difference between Peritoneal Carcinomatosis Index at laparotomy or Completeness of Cytoreduction score. Grade III and IV complications rates did not significantly differ between “CRS plus HIPEC” group and “CRS only” group (20.7% vs 20.7%, p=0.739). Survival analysis showed no statistical difference between both groups. Median OS time was 19.2 months in “CRS plus HIPEC” group and 29.7 months in “CRS only” group (p=0.606). Median PFS survival time was 10.7 months in “CRS plus HIPEC” group and 13.1 months in “CRS only” group (p=0.511).ConclusionThe use of HIPEC combined to CRS appears to be as effective, well tolerated and feasible as CRS alone in patients with primary or recurrent peritoneal metastasis of endometrial cancer.