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Background: In colon cancer (CC), surgery remains the mainstay of treatment with curative intent. Despite several clinical trials comparing open and laparoscopic approaches, data on long-term outcomes for stage III CC are lacking.Methods: This post-hoc analysis of the European PETACC8 randomized phase 3 trial included patients from 340 sites between December 2005 and November 2009, with long follow-up (median 7.56 years). Patients were randomly assigned to FOLFOX or FOLFOX + cetuximab after colonic resection. The surgical approach was left to the referring surgeon's discretion.Results: Among 2555 patients included, 1796 (70.29%) were operated on by open surgery and 759 (29.71%) by laparoscopy. The 5-year OS rate was better after laparoscopic resection (85.4%, 95%CI 82.5-87.7) than after open surgery (80.2%, 95%CI 78.2-82.0; p = 0.002). The 5-year DFS rate was also better after laparoscopy ( p = 0.016). However, in multivariate analysis using a propensity matching, the surgical approach was not found to be an independent prognostic factor for OS or DFS. OS ( p = 0.0243) and DFS ( p = 0.035) were increased after laparoscopic surgery in KRAS/BRAF WT sub-group Conclusion:We showed that laparoscopic resection has comparable long-term outcomes to open surgery in patients with stage III CC. For those with RAS and BRAF WT CC, laparoscopic colectomy may favorably impact survival.

Optimal clinical pathway (more convincing and reassuring remarks in the preoperative consult and a dedicated outpatient facility) is the key to increase success in outpatient laparoscopic cholecystectomy.

Background. Recurrence patterns in stage III colon cancer (CC) patients according to molecular markers remain unclear. The objective of the study was to assess recurrence patterns according to microsatellite instability (MSI), RAS and BRAF V600E status in stage III CC patients.