Abstract: Fifty-seven patients suffering from alimentary tract cancer or precancerous gastric diseases were treated in three years. Forty-five were males and 12 were females, ages 41 to 83. The argon laser used had a wavelength of 5145 ampere$DGR@, a power output of 100 J/cm$+2$/. The validity of diagnosis by fluorescence against pathological diagnosis in regard to 22 of the 57 patients was 86.4%. The full spectrum argon laser and pump dye laser had a wavelength of 6300 ampere$DGR and a power output of 200 - 400 J/cm$+2$/. The total validity was 93%. The survival rate for a half year was 92.3%; for one year, 86.5%; and for two years, 68.3%. Selective function of PDT on cancerous tissues is harmless to normal ones and without side effects. PDT may have palliative effects on advanced alimentary tract cancer. It is very effective in treating the second and third degree untypical hyperplasia of precancerous gastric diseases. !0
展开▼
