1984 Volume 26 Issue 9 Pages 1523-1527_1
An 81-year-old man was referred to our hospital for laser therapy of gastric lesions under endoscopy. UGI series showed a 2c+2a type lesion, 38mm in diameter, on the posterior wall of the lower body and aIIc + II type lesion, 43mm in diameter, on the anterior wall of the middle body of the stomach. The same findings were recognized by gastroscopy but the lesion on the anterior wall had more irregular invasion. W repeatedly radiated these lesions by YAG laser with 70w, duration time of 1 sec. at distance of about 10mm. Total energy was about 10, 000 J regionally. The lesion on the posterior wall was completely treated, but cancer was not eradicated at the lesion on the anterior wall. Therefore, N2 dye laser was irradiated after injection of 4.5mg/kg HpD, with average power of about 50mw, duration time of 30 min. at distance of about 10mm. With this therapy the anterior lesion could also be completely eliminated. From this experience, we think that large or wide invasion of early gastric cancer should be treated firstly by Nd-YAG laser having high power, and if cancer still remains, it is desirable to treat it with photoradiation therapy. This "combination laser therapy" under endoscopy may be extremely useful for a large cancer lesion of the alimentary tract.
