Risk factors and clinicopathological study of prognostic factors in the peritoneal mesothelioma.

This study evaluates the clinical and treatment related prognostic indicators for survival of patients undergoing cytoreductive surgery and hyperthermic intraperitoneal chemotherapy for peritoneal mesothelioma. We did an observational study of the risk factors and clinicopathological factors of 20 patients undergoing cytoreductive surgery and hyperthermic intraperitoneal chemotherapy for peritoneal mesothelioma at the St George Hospital, Sydney. Survival analysis was performed using the Kaplan-Meier method and prognostic factors were correlated with survival using the Log Rank test. There were six females. The mean age was 55 years. The overall median survival was 30 (0.5-87) months with 1- and 3-year survival of 78 per cent and 46 per cent, respectively. The overall median disease-free survival was 8 months. Factors influencing a longer disease-free survival included age > or = 55 (P = 0.006), not smoking (P = 0.04), female (P = 0.03), and epithelioid tumors (P = 0.002). Overall survival was influenced by not consuming alcohol (P = 0.003), complete cytoreduction (P = 0.02), and epithelioid tumors (P = 0.01). Risk factors identified to be prognostic for survival include the female gender, not smoking, not consuming alcohol, and an epithelioid tumor type. Treatment factor associated with an improved survival was a complete cytoreduction.