This document summarizes 8 cases of minimally invasive conventional surgery for GI cancer. Case 4 describes a 45-year-old woman who presented with bloody motions for 2 months and tenesmus. Diagnostic tests revealed a 3cm well-differentiated adenocarcinoma of the rectum 5cm from the anal margin, localized and not involving deeper layers. An endoluminal full thickness excision with a 2cm safety margin was performed. The histopathology report found the tumor was 2.5cm in diameter with clear margins and only involving superficial muscle layers. A Hartman's protective colostomy was also performed through a 3cm incision. The patient had an uneventful recovery.