title: Incidence of port-site metastasis after undergoing robotic surgery for biliary malignancies.
abstract: OBJECTIVE
  To investigate the incidence of clinically detected port-site metastasis (PSM) in patients who underwent robotic surgery for biliary malignancies.
  
  
  METHODS
  Using a prospective database, the patients undergoing fully robotic surgery for biliary malignancies between January 2009 and January 2011 were included. Records of patients with confirmed malignancy were reviewed for clinicopathological data and information about PSM.
  
  
  RESULTS
  Sixty-four patients with biliary tract cancers underwent robotic surgery, and sixty patients met the inclusion criteria. The median age was 67 year (range: 40-85 year). During a median 15-mo follow-up period, two female patients were detected solitary PSM after robotic surgery. The incidence of PSM was 3.3%. Patient 1 underwent robotic anatomatic left hemihepatectomy and extraction of biliary tumor thrombi for an Klatskin tumor. She had a subcutaneous mass located at the right lateral abdominal wall near a trocar scar. Patient 2 underwent robotic pancreaticoduodenectomy for distal biliary cancer. She had two metachronous subcutaneous mass situated at the right lateral abdominal wall under a same trocar scar at 7 and 26 mo. The pathology of the excised PSM masses confirmed metastatic biliary adenocarcinoma.
  
  
  CONCLUSIONS
  The incidence of PSMs after robotic surgery for biliary malignancies is relatively low, and biliary cancer can be an indication of robotic surgery.
authors.affiliation: Department of Hepatobiliary Surgery, Institute of Hepatobiliary Gastrointestinal Disease, PLA Second Artillery General Hospital, Beijing100088, China.
authors.forename: Quan-Da
authors.initials: QD
authors.lastname: Liu
authors.forename: Jun-Zhou
authors.initials: JZ
authors.lastname: Chen
authors.forename: Xiao-Ya
authors.initials: XY
authors.lastname: Xu
authors.forename: Tao
authors.initials: T
authors.lastname: Zhang
authors.forename: Ning-Xin
authors.initials: NX
authors.lastname: Zhou
mesh_terms: D000230:Adenocarcinoma / Q000473:pathology / Q000601:surgery*; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001661:Biliary Tract Neoplasms / Q000473:pathology / Q000601:surgery*; D001662:Biliary Tract Surgical Procedures / Q000009:adverse effects*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009366:Neoplasm Seeding; D012307:Risk Factors; D012371:Robotics; D025321:Surgery, Computer-Assisted / Q000009:adverse effects*; D013997:Time Factors; D014057:Tomography, X-Ray Computed; D016896:Treatment Outcome