On 40 cases of residual tumor after endoscopic mucosal resection for eraly gastric cancer we performed laser irradiation with Nd-YAG laser as an additional treatment. Residual rate after laser treatment was 10.0%(4/40), and recurrence rate during follow-up was 16.0%(4/25), exclusing short period follow-up cases. In 3 of 4 recurrent cases, cancer disappeared after the second laser irradiation. The final cancer free rate was 82.8%(24/29). Normaly additional laser treatment was indicated for inoperable patient. In 8 of 40 cases in operable patients,we performed additional laser treatment. None of 8 cases were found residual or recurrence tumor following period of 6-47 months (mean: 21months). We think that the lesion is belonged to the criteria of non lymph-node metastasis group,and when collected tissue by endoscopic mucosal resection is enough for evaluating the lesion,additional laser therapy is a non invasive good treatment for residual tumor.
