Peritoneal carcinomatosis of colorectal cancer: novel clinical and molecular outcomes

BACKGROUND: The objective of this study was to identify the prognostic impact of parameters in peritoneal carcinomatosis from colorectal cancer. METHODS: We collected data from patients treated by cytoreductive surgery and Hyperthermic Intraperitoneal Chemotherapy for peritoneal carcinomatosis secondary to colorectal cancer. RESULTS: Ninety-one procedures were performed. In univariate analysis, an increased peritoneal cancer index was associated with decreased survival (P < .001). The presence of signet ring cells was associated to a decrease in survival from 45.8 to 12.1 months (P < . 001). Microsatellite sequences instability status was the only molecular prognostic factor correlated with an increase in median disease-free survival: 12.4 vs 24.9 months (P = .01). The presence of a mucinous component was associated with a decreased of survival from 51.9 to 35.1 months (P = .02). CONCLUSIONS: Clinical factors were affecting the survival of patients. The absence of signet ring cells and mucinous component and the presence of microsatellite sequences instability may be favorable prognostic factors. (C) 2016 Elsevier Inc. All rights reserved.