Surgical and survival outcomes of cytoreductive surgery alone or with perioperative intraperitoneal chemotherapy in high peritoneal cancer index.

Objectives: The aim of this study was to examine the early surgical and long-term survival outcomes of cytoreductive surgery (CRS) alone and CRS plus perioperative intraperitoneal chemotherapy (IPC) in patients with peritoneal metastases (PM).

Material And Methods: CRS alone or CRS plus IPC was performed on 122 patients for various intraabdominal PMs. Patients were divided into two groups as PCI ≤19 and PCI >19 to compare early surgical outcomes.

Results: Among PM patients 70 (57.4%) were of non-ovarian and 52 (42.6%) were of ovarian origin. Of the patients 74 (60.7%) were in the peritoneal cancer index (PCI) ≤19 group and 48 (39.3%) were in the PCI >19 group. The complication ratio of PCI >19 group was higher than that of the PCI ≤19 group and median overall survival (OS) of PCI >19 group was lower than that of the PCI ≤19 group. Complete or nearly complete (CCR-0/CCR-1) resections rates were similar in both groups (95.9% in the PCI ≤19 group and 93.8% in the PCI >19 group). However, CCR-0 resection rate was found to be lower in the PCI >19 group compared to the PCI ≤19 group (60.8% vs. 39.6%) (p <0.001).

Conclusion: CCR-0/CCR-1 resections can be achieved with CRS in most patients with PCI >19 score. It would be appropriate to consider CRS or CRS plus perioperative IPC for palliative purposes in selected patients with PCI >19 score.