Purpose: Peritoneal dissemination is expected to be present in P1, P2, and P3 according to the 8th edition of colon cancer handling convention. The peritoneal carcinomatosis index (PCI) plays a central role in classification of peritoneal metastases.
Patients and methods: Peritoneal dissemination was examined during surgery in patients with colon cancer and peritoneal metastasis undergoing treatment with oxaliplatin-based chemotherapy.
Results: Correlation between PCI and P1, P2, and P3 was found. Moreover, using a PCI cut-off value of 6 for peritoneal dissemination, there was a significant difference in survival.
Conclusion: Positive correlation was found between PCI and P classification of colon cancer. Regardless of the presence metastases to other organs, there is a possibility that PCI is effective in predicting prognosis of patients with peritoneal dissemination- positive colon cancer.