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为探讨光动力学疗法对消化道癌术后局部复发癌的效果，对此类患者１０３例应用光动力学疗法。患者于照光前４８～７２小时静脉滴注ＨｐＤ，每公斤体重５ｍｇ。激发光源采用氩离子泵浦染料激光器，波长６３０ｎｍ，输出功率密度２００～４００ｍＷ／ｃｍ２，能量密度２００～２５０Ｊ／ｃｍ２，照射时间约１０～１５分钟。１０３名患者中，食管癌１４例、贲门癌５０例、胃癌３３例、直肠癌６例。有效者７４例，总有效率７１．８％。肿瘤小于１ｃｍ者３６例，３４例有效，有效率９４．４％。随访存活１年以上者３６．９％，２年以上者１８．４％，２例最长存活者已１０年尚健在。
To investigate the effect of photodynamic therapy on local recurrence of cancer after surgery for gastrointestinal cancer, 103 patients were treated with photodynamic therapy. The patient was intravenously infused with HpD 48 to 72 hours before exposure to light, 5 mg per kilogram of body weight. The excitation light source adopts an argon ion pumped dye laser with a wavelength of 630 nm, an output power density of 200 to 400 mW/cm2, an energy density of 200 to 250 J/cm2, and an irradiation time of about 10 to 15 minutes. Of the 103 patients, 14 had esophageal cancer, 50 had cardiac cancer, 33 had gastric cancer, and 6 had rectal cancer. 74 effective cases, the total efficiency of 71.8%. Thirty-six patients with tumor less than 1cm were effective in 34 cases with an effective rate of 94.4%. Among the patients who survived for more than one year, 36.9% were followed-up, and 18.4% were younger than two years. The longest survivors of 2 cases were still healthy for 10 years.