Endoscopic localization of colon cancers.

In order to determine the accuracy of endoscopic localization of colon cancers, the endoscopic location was compared to the actual location at the time of operation in 320 patients who underwent resection of intraabdominal colon cancer between 1983 and 1988. The endoscopic location was correct in 86% of the cases. There were 44 endoscopic errors, including seven missed cancers. One-third of all endoscopic errors occurred when the tumor was in the cecum. We conclude that endoscopy is an accurate method of localizing colon cancers. However, with the advent of laparoscopic surgery and the loss of the ability to palpate the colon, the 14% of endoscopic errors take on a greater importance and additional means for localizing tumors should be pursued in selected cases.