Incidence of port-site metastasis after undergoing robotic surgery for biliary malignancies

AIM: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.CONCLUSION:The incidence of PSMs after robotic surgery for biliary malignancies is relatively low,and biliary cancer can be an indication of robotic surgery.