Photodynamic Therapy (PDT) is one of the most interesting and promising treatment approaches in modern medicine: Up to now it is already used very successfully in oncology and dermatology. The principle is the stimulation of a nontoxic light-sensitive substance (photosensitizer) by specific (laser-) light. The sensitizers bind to any type of targeted malignant or other diseased cells in the organism with very high specificity. After stimulation with (laser) light, the targeted cells are destroyed by the formation of active oxygen radicals.

One of the major advantages of Photodynamic Therapy is that it can be applied without any side- effects.