Abstract
The effect of YAG laser irradiation to the cultured gastric cancer cells was investigated and following results were obtained. Survival rate of normal mucosal cells after laser irradiation was higher than that of gastric cancer cells. The effect of laser to the poorly differentiated adenocarcinoma cells was more prominent than to the tubular adenocarcinoma cells. This may be because of the different sensitivities to the laser among histological type of cancer cells.
