Korean J Gastrointest Endosc.
2006 Feb;32(2):81-86.
Photodynamic Therapy for Superficial Gastrointestinal Tumors
- Affiliations
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- 1Department of Internal Medicine, Institute for Digestive Research, Soon Chun Hyang University College of Medicine, Seoul, Korea. csshim@hosp.sch.ac.kr
Abstract
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BACKGROUND/AIMS: Although photodynamic therapy (PDT) has been used for the endoscopic treatment of digestive cancer, its curative efficacy remains uncertain. This study evaluated the curative role of PDT in superficial gastrointestinal cancer.
METHODS
Fifteen lesions in 14 patients with a histologically proven carcinoma (early esophageal cancer 6, early gastric cancer 8, ampulla of Vater cancer 1) were injected with an intravenous hematoporphyrin derivative (2 mg/kg), and PDT was performed 48 hours later. The response to treatment was assessed by gastroscopy with biopsies.
RESULTS
The median follow-up time was 273 days (42~1,030 days). According to the TNM stage of endoscopic ultrasonography, there were 14 T1 cases and 1 T2 case. Complete remission was observed in 13 cases after the initial and consecutive PDT. There were 2 cases of failure. The recurrence rate was 15.4% (2/13), and the median time from the initial PDT to recurrence was 349 days.
CONCLUSIONS
PDT using a hematoporphyrin derivative as a photosensitizer is a safe and efficient method for treating early cancer. However, a long-term follow up period using a large population sample will be needed for confirmation.
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