Propensity matched comparison of extrapleural pneumonectomy and pleurectomy/decortication for mesothelioma patients

OBJECTIVES: The objective of this retrospective study was to assess perioperative outcomes, overall survival and freedom from recurrence after induction chemotherapy followed by extrapleural pneumonectomy (EPP) or pleurectomy/decortication (P/D) in patients with mesothelioma in a propensity score matched analysis. METHODS: Between September 1999 and August 2015, 167 patients received multimodality treatment (platinum-based chemotherapy followed by EPP [n=141] or P/D [n=26]). We performed 2:1 propensity score matching for gender, laterality, epithelioid histological subtype and International Mesothelioma Interest Group (iMig) stage (52 EPP and 26 P/D). RESULTS: Postoperative major morbidity (48% vs 58%, P=0.5) was similar in both groups; however, the complication profile and severity were different and favoured P/D; the 90-day mortality (8% vs 0%, P=0.3) rate was lower in P/D although not statistically significant. Prolonged air leak (>= 10 days) occurred in 15 patients (58%) undergoing P/D. The intensive care unit stay was significantly longer after EPP (P=0.001). Freedom from recurrence was similar for both groups (EPP: median 15 months, 95% confidence interval [CI]: 10-21; P/D: 13 months, 95% CI: 11-17) (P=0.2). Overall survival was significantly longer for patients undergoing P/D (median 32 months, 95% CI: 29-35) compared to EPP (23 months, 95% CI: 21-25) (P=0.031), but in the P/D group many cases were censored (73%) and the follow-up time was relatively short. CONCLUSIONS: P/D and EPP seem to have similar rates of major morbidity, although the profile of complications is different and more severe after EPP. Freedom from recurrence is comparable in both groups whereas improved overall survival needs to be confirmed in a large patient group with longer follow-up.