The photodynamic therapy (PDT) is an excellent achievement of traditional tumor therapy ideals. The principle is as follows. A special photosensitive drug will be injected into human body and then it will selectively stock in tumor organizations after sometime. The photosensitive

drug in the tumor will be activated by laser irradiation with special wavelength and then conduct light-activated reaction to lead to cytotoxicity with the joint effort of oxygen. At last, it will kill tumor cells without any impact on normal cells.

The advantages of PDT
1) Selectiveness. Photosensitive drug will be only absorbed by tumor. It is targeted at cancer cells without body’s toxicity and no impact on normal cells.

2) Effectiveness. Light-activated reaction will be created in all tumor cells and eliminate major and hidden focuses.

3) Minimal invasion. Laser guides PDT with optic fibers. Its features are as follows: no operation, short treatment time, minimal invasion and little pain.

4) Comprehensiveness. PDT is effective to various type of cancer cell organization. Its application is not limited to cancer cell types.

This includes skin puncture drainage technology, narrow or block cavity expansion technology and trestle setting technology. Tumor always sparks off that the mass of human important pipes and normal function. According to disease variety, tumor treatment center of Hospital Guangzhou boasts utilize pipes, internal culvert pipes to treat disease.

1) Radioactive esophagus trestle will be used to resolve the esophagus cancer patient's difficulty such as hard eating. It can also be conducted radioactive therapy.

2) Vessel's internal trestle will be used to resolve the issues such as arterial and vein block constricted by tumor.

3) Biliary trestle will be used to treat biliary atresia and block-caused jaundice constricted by tumor.

4) Windpipe internal trestle will be utilized to treat airway block constricted by tumor.