Abstract
The prognosis of patients with pancreatic and biliary tract cancer treated with conventional therapies such as stent insertion or chemotherapy is often poor, and new approaches are urgently needed. Surgery is the only curative treatment but is appropriate in less than 20% of cases, and even then it is associated with a 5-yr survival of less than 30% in selected series. Photodynamic therapy represents a novel treatment for pancreaticobiliary malignancy. It is a way of producing localized tissue necrosis with light, most conveniently from a low-power, red laser, after prior administration of a photosensitizing agent, thereby initiating a non-thermal cytotoxic effect and tissue necrosis. This review outlines the mechanisms of action of photodynamic therapy including direct cell death, vascular injury, and immune system activation, and summarizes the results of preclinical and clinical studies of photodynamic therapy for pancreaticobiliary malignancy.
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