[Application of transendoscopic Nd-YAG laser to stenosis caused by unresectable carcinoma of the alimentary tract].
Clinical and pathological studies were performed on the efficacy of transendoscopic Nd-YAG laser irradiation to stenosis by unresectable carcinoma of the alimentary tract, and the following conclusions were obtained. Nd-YAG laser was irradiated with 30-40W, total energy 3,000-12,000J, to carcinoma of 8 cases of the esophagus, 4 cases of the stomach, 7 cases of recurrence at gastric anastomosis site and 4 cases of the large intestine, and it evaporated and reduced tumor to relieve of stenosis. The patients's quality of life was remarkably improved. Pathological study on biopsied specimens at the site of irradiation revealed no residual viable cancer cell within at least 6mm depth from the surface of carbonization layer. No perforation, no massive bleeding, no pain were recognized both during and after irradiation.
Ono
S
S
Department of Surgery, Tokyo Dental College, Chiba, Japan.
Kato
S
S
Tanaka
T
T
D000368:Aged; D000369:Aged, 80 and over; D003251:Constriction, Pathologic; D004067:Digestive System Neoplasms / Q000601:surgery*; D004724:Endoscopy; D006801:Humans; D053685:Laser Therapy; D008297:Male