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Solaini, Leonardo; Ministrini, Silvia; Bencivenga, Maria; D’Ignazio, Alessia; Marino, Elisabetta; Cipollari, Chiara; Molteni, Beatrice; Mura, Gianni; Marrelli, Daniele; Graziosi, Luigina; Roviello, Franco; De Manzoni, Giovanni; Tiberio, Guido A. M.; Morgagni, Paolo
Gastric cancer, 11/2019, Volume: 22, Issue: 6Journal Article
Background The aim of this study is to report the experience with conversion surgery from six Gruppo Italiano Ricerca Cancro Gastrico (GIRCG) centers, focusing our analysis on factors affecting survival and the risk of recurrence. Methods A retrospective, multicenter cohort study was performed in patients who had undergone conversion gastrectomy between 2005 and 2017. Data were extracted from a GIRCG database including all metastatic gastric cancer patients submitted to surgery. Only stage IV unresectable tumors/metastases which became resectable after chemotherapy were included in this analysis. Results Forty-five resected M1 patients were included in the analysis. Reasons for being deemed unresectable at diagnosis were peritoneal involvement (PCI > 6) ( n = 38, 84.4%), distant metastatic nodes ( n = 3, 6.6%) and extensive liver involvement ( n = 4, 8.8%). Median follow-up was 25 months (IQR 9-50). Median overall survival from surgery was 15 months and 1-, 3- and 5-year survivals were 57.2, 36.1 and 24%, respectively. Median progression-free survival was 12 months with 1- and 3-year survival of 46.4 and 33.9%, respectively. At cox regression analysis the only independent prognostic factor for OS was the presence of more than one type of metastasis (HR 4.41, 95% CI 1.72–11.3, p = 0.002). A positive microscopic resection margin was the only risk factor for recurrence (HR 5.72, 95% CI 1.04–31.4, p = 0.045). Conclusions Unresectable stage IV GC patients could benefit from radical surgery after chemotherapy and achieve long survivals. The main prognostic factor for these patients was the presence of more than one type of extra-gastric metastatic involvement.
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