Richard Mast, Maria José Paules, Cinta Hierro Carbó, Farran Leandre, H. Aranda, Mariona Calvo, Joan B. Gornals, Gloria Creus, Gloria Hormigo, Maica Galán, and Martín Francisco Javier Pérez
Introduction Since 2006, the results of MAGIC trial demonstrated that a perioperative regimen of Epirrubicin-cisplatin-5FU (ECF) decreases tumour size and stage, with significantly improvement in overall survival (OS) and progression-free survival (PFS). However, the survival rate of patients (pts) with locally advanced resectable gastric cancer (LARGC) remains poor. Our aim was to identify prognostic factors and their correlation with a more aggressive disease in our area. Methods We retrospectively reviewed 65 pts with LARGC who were planned to receive perioperative chemotherapy followed by surgery at our institution, between May 2008 and February 2012. We analysed the correlation between mOS and recurrence free survival (RFS) with patient characteristics, sex and age, and some tumour characteristics, as histology, tumour localization, both clinical and pathological stage, and tumour regression rate (TRR). OS and RFS was analysed using Kaplan-Meier curves and the differences with Log-Rank test. Results 16 women and 49 men were analysed, with a median age of 63 years (range 38-78). 41% pts had a diffuse type, 49% an intestinal type and 10% a mixt type adenocarcinoma. 30% of tumours were proximal and 70% were distal. There were clinically 1.6% stage I, 49.2% stage II and 49.2% stage III pts. 58 pts (98%) completed 3 cycles of neoadjuvant chemotherapy. 42 pts received ECF, whereas 23 pts received other schemes (13 pts carboplatin+5FU, 8 pts cisplatin+5FU, 2 pts other combinations). Radiological downstaging was observed in 59% pts. 40 total gastrectomy, 14 partial gastrectomy and 9 Ivor-Lewis were conducted. There was 1 pt who underwent a palliative derivation. We found 1 surgery-related death. Adjuvant chemotherapy was delivered in 45 pts. There were pathologically 22% stage I, 47% stage II, 22% stage III and 9% stage IV pts. Pathological downstaging in terms of TRR (RG1+RG2+RG3) was obtained in 42% pts, achieving 3 complete responses (RG1). 4 pts had marked regression (RG2) and 19 pts had 10-50% viable tumour remaining (RG3), meanwhile 36 pts did not respond (RG4). The median follow-up of the whole group was 24 months. We did not reach nor the mOS neither the mRFS, given that 70% pts were alive after 2 years. 2 year OS was 72% (95 CI, 60.3%-83.6%) and 2 year RFS was 52.5% (95 CI, 39.8%-65.3%). Age Conclusion Preoperative chemotherapy contributes to pathological downstaging and histologic tumour regression in less than 50% pts. Age>60 years, minor pathological downstaging and tumour regression rate have been objectively correlated to poor outcomes. New patient and tumour characteristics must be identified as prognostic and predictive factors. The development of targeted therapies should provide new possibilities in the treatment of LARGC.