Safety and Effectiveness of Laser in Cancer Treatment

Abstract

The research is a comparative study of therapeutic properties of light (Laser) in cancer treatment, it was only in the last century that photodynamic therapy (PDT) was developed. At present, PDT is being tested in the clinic for use in oncology — to treat cancers of the head and neck, brain, lung, pancreas, intraperitoneal cavity, breast, prostate and skin. The Thesis explain PDT concept, uses of PDT to treat cancer and other diseases, Photodynamic therapy involves administration of a tumorlocalizing photosensitizing agent, which may require metabolic synthesis (i.e., a prodrug), followed by activation of the agent by light of a specific wavelength. This therapy results in a sequence of photochemical and photobiologic processes that cause irreversible photodamage to tumor tissues. Results from preclinical and clinical studies conducted worldwide over a 25-year period have established photodynamic therapy as a useful treatment approach for some cancers. regulatory approval for photodynamic therapy involving use of a partially purified, commercially available hematoporphyrin derivative compound (Photofrin®) in patients with early and advanced stage cancer of the lung, digestive tract, ,this research discuss the reactions of PDT types and its effect on tumor damages.