“…Although we attempted several methodological options within our 6-year experience, no definitive results could be obtained. We believe that widespread use of RIGS in colorectal cancer surgery should be supported by further technical improvements and by the evaluation of newer MAbs such as CC49 and CC83 [9,10]. Research is needed to further develop techniques that may increase the antigen immunological expression at the tumor site through the use of biological response modifiers [11,12] or the avidin-biotin system to increase RIGS utility.…”