Abstract
Thirty five patients with colorectal mucosal cancer resected surgically from 1993 to 1997 were studied to evaluate the problems of endoscopic resection and benefits of surgical resection. There were 13 patients with large tumor. In most of the patients, the dimension of tumor was larger than 2/3 of large bowel. This "relative tumor size was important for endoscopic resection. There were 6 patients with tumor for which endoscopic resection could not be performed. Of the 6 patients, 2 had a positive non-lifting sign, 2 having a depressive lesion (IIc') that could not be snared, and 2 having a cecal tumor on the appendical orifice. Eight patients with tumor in the rectum (Rb) were selected to have surgical local excision for certainly negative tumor margin. Eight patients were over-diagnosed to have SM' massive invasive cancer by endoscopic finding. In general, endo-scopic resection should be performed for colorectal mucosal cancers but the fact that there were patients with tumor which could not be resected endoscopically and surgical resection had advantage in some cases over endoscopic resection leads to the necessity to select the appoprinte method of resection.
