title: Robot-assisted versus open liver resection in the right posterior section.
abstract: BACKGROUND
  Open liver resection is the current standard of care for lesions in the right posterior liver section. The objective of this study was to determine the safety of robot-assisted liver resection for lesions located in segments 6 and 7 in comparison with open surgery.
  
  
  METHODS
  Demographics, comorbidities, clinicopathologic characteristics, surgical treatments, and outcomes from patients who underwent open and robot-assisted liver resection at 2 centers for lesions in the right posterior section between January 2007 and June 2012 were reviewed. A 1:3 matched analysis was performed by individually matching patients in the robotic cohort to patients in the open cohort on the basis of demographics, comorbidities, performance status, tumor stage, and location.
  
  
  RESULTS
  Matched patients undergoing robotic and open liver resections displayed no significant differences in postoperative outcomes as measured by blood loss, transfusion rate, hospital stay, overall complication rate (15.8% vs 13%), R0 negative margin rate, and mortality. Patients undergoing robotic liver surgery had significantly longer operative time (mean, 303 vs 233 minutes) and inflow occlusion time (mean, 75 vs 29 minutes) compared with their open counterparts.
  
  
  CONCLUSIONS
  Robotic and open liver resections in the right posterior section display similar safety and feasibility.
authors.affiliation: Department of Surgery, Division of General, Minimally Invasive and Robotic Surgery, ASL Umbria Hospital San Matteo degli Infermi.
authors.forename: Alberto
authors.initials: A
authors.lastname: Patriti
authors.affiliation: Department of Surgery, Hepatobiliary Unit, San Raffaele Scientific Institute, Milan, Italy.
authors.forename: Federica
authors.initials: F
authors.lastname: Cipriani
authors.affiliation: Department of Surgery, Hepatobiliary Unit, San Raffaele Scientific Institute, Milan, Italy.
authors.forename: Francesca
authors.initials: F
authors.lastname: Ratti
authors.forename: Alberto
authors.initials: A
authors.lastname: Bartoli
authors.affiliation: Department of Surgery, Division of General Surgery, Hospital of Nuoro, Italy.
authors.forename: Graziano
authors.initials: G
authors.lastname: Ceccarelli
authors.affiliation: Division of Minimally Invasive Surgery, Clinica Privata Città di Roma, Roma, Italy.
authors.forename: Luciano
authors.initials: L
authors.lastname: Casciola
authors.affiliation: Department of Surgery, Hepatobiliary Unit, San Raffaele Scientific Institute, Milan, Italy.
authors.forename: Luca
authors.initials: L
authors.lastname: Aldrighetti
mesh_terms: D006528:Carcinoma, Hepatocellular / Q000601:surgery*; D005260:Female; D006498:Hepatectomy / Q000379:methods*; D006801:Humans; D010535:Laparoscopy / Q000379:methods*; D008113:Liver Neoplasms / Q000601:surgery*; D008297:Male; D008875:Middle Aged; D061646:Operative Time; D012371:Robotics; D016896:Treatment Outcome
keywords: Hepatocellular carcinoma; Liver; Liver metastasis; Liver resection; Robot-assisted liver resection