Clinical characteristics, treatment, and survival outcomes in malignant pleural mesothelioma: A institution experience in Turkey.

Abstract

e18544 Background: Malignant pleural mesothelioma (MPM) is a aggressive tumor that causes high mortality. Treatment of MPM remains disappointing, even new approaches are present today. Methods: The present study retrospectively examined the data related to 150 patients with MPM who were examined and treated in our center in Turkey from 2005 to 2012. The aims of this study were; to investigate clinicopathologic characteristics, treatment modalities and potential prognostic factors. Results: There were 87 males (58%) and 63 females (42%), 92 of the patients (61.3%) had an asbestos contact and this contact was generally environmental. Surgical resection (EPP or P/D) was used in 32 patients, 87 patients (58%) received only chemotherapy. The median progression free and overall survival (PFS and OS) for all patients were 10.6 and 14.8 months. There was no statistically significant difference between the patients who received pemetrexed/cisplatin (54 patients) and gemcitabine/cisplatin (28 patients) regimens in terms of the PFS and OS (p=0.145, p=0.244). The comparison between patients who were operated on and those who were not did not reveal any statistical difference in PFS and OS (p=0.416, p=0.095). There was no difference in both PFS and OS rates in comparison of patients who had P/D or EPP (p=0.87, p=0.652). Log rank analysis, ECOG performance status (p=0.018), histology (p<0.001), stage (p<0.001) and leukocytosis (p=0.005) were found to be significant prognostic factors in OS. At multivariate analysis, ECOG performance status (p=0.016), and stage (p<0.001) remained independently associated with OS. Conclusions: In survival analysis revealed significant differences in terms of both the PFS and OS, performance status, histology, stage and leukocytosis. EPP or P / D surgical options did not provide difference in term of survival. Survival rates in patients who received combining platinum analogues with pemetrexed or gemcitabine as front-line chemotherapy were found similar.