Predictive Factors Analysis for Malignant Peritoneal Mesothelioma

Malignant peritoneal mesothelioma (MPM) is an uncommon disease with a dismal prognosis and unclear natural history. The present study aims to assess potential prognostic factors and management of MPM.

Clinical records of 39 patients with MPM between December 2003 and April 2014 were retrospectively reviewed. Overall survival was identified with Kaplan-Meier curves and Cox regression analysis.

Mean age of 39 patients was 55.0 years; asbestos exposure was recorded in two patients. Main presentations were abdominal distension, abdominal pain, and weight loss. Thrombocytosis, low serum albumin level, and anemia were principal laboratory abnormalities. Ascites, peritoneal cavity mass, and peritoneum thickening were the main signs on CT scans. Cytoreductive surgery (CRS) plus adjuvant therapies were performed in 22 patients, single chemotherapy in 13, and best supportive care in 4. Median survival time was 10.0 months after pathological diagnosis, with a 6-, 12-, 18-, and 24-month survival rate of 84.4, 31.6, 18.5, and 15.8 %, respectively. Significant prognostic factors were age, performance status (PS), abdominal pain, serum albumin level, thrombocytosis, and treatment strategy on univariate analysis, while only age, abdominal pain, and treatment strategy hold statistical significance on multivariate analysis.

Age ≤65 years, abdominal pain, and CRS plus adjuvant therapy are independent positive prognostic factors of MPM.