We have treated mainly gastric cancer, by using new type of endo-probe made by ceramic. As a result, 1) much more correct effect of vaporization for tumor can be achieved than noncontact method of it. 2) Shortening of the treating time and stable effect by definite distance can be obtained. 3) Sufficient effect under low power condition of Nd-YAG laser as 10 to 30W for 1 to 2 sec irradiation can be performed.
