Abstract
Endoscopic laser irradiation is clinically applied to the hemostasis of gastro-intesinal bleeding. Now, it's used for the treatment of the gastric tumor. Our purpose is to examine the efficacy and safety of laser treatment of gastric protrouding tumor. We treated 10 cases of gastric protrouding tumor. These consist of 5 cases of gastric adenoma (one case included focal cancer) and 5 cases of early gastric cancer (IIa 3 cases, IIb 2 cases). Our method is that first, we cut off the main tumor by snare ectomy method with the high frequency electric current and next, irradiate the remained tumor. Irradiation was performed under the condition (Power of 60 watt, time of 1.0 sec). In gastric adenomas, almost whole tumor disappeared and no evidence of tumor recurrence has been observed endoscopically and histologically. In early gastric cancers, 2 cases of 5 cases recurred and were tried to reirradiation. In one case, tumor located widely, so we were requirred to several times irradiation. In another case, tumor were located posterior wall of Autrum, so we couldn't irradiate enough to disappeare. After irradiation, it's difficult to see cleardy the irradiating area because of bleeding or edema. So, our opinion about technical problems are as follows: High power irradiation, Marking of the lesion and Irradiation frame margine to center is necessary.
