Abstract
Photodynamic therapy has been applied predominantly to patients with cutaneous and bronchial malignancies for more than a decade. More recently major interest has been focused on the endoscopic application of photodynamic therapy to tumors in hollow organs. Combining the favorable properties of laser light and a tumor localizing photosensitizer provides effective tumor destruction with a minimum of risk for the patient. Photodynamic therapy in gastrointestinal and genitourinary cancer may be indicated as an alternative to conventional therapy, particularly in superficial malignancies and localized recurrent disease.
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