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patient's vein to accumulate in the tumor. This stage is called photosensitization. When the photosensitizer accumulates in the cancer cells, the basalioma is viewed in ultraviolet light to mark its border on the skin, since it will glow pink, fluorescence occurs, which is called video fluorescent marking. Next, the tumor is illuminated with a red laser with a wavelength corresponding to the maximum absorption of the photosensitizer (for example, 660-670 nm for Photoditazine). The laser density should not heat living tissue above 38С (100 MW/cm). The time is set depending on the size of the tumor. If the tumor has a size of 10 kopecks, then the exposure time is 10-15 minutes. This stage is called photo exposure. When oxygen enters into chemical reactions, the tumor dies off without damaging healthy tissues. In this case, cells of the immune system: macrophages and lymphocytes absorb the cells of a dead tumor, which is called photoinduction of immunity. Relapses at the site of the original basalioma do not occur. Photodynamic therapy is increasingly replacing surgical and radiation treatments.
Photodynamic therapy for basalioma is aimed at the selective destruction of tumor cells by substances - photosensitizers when exposed to light. At the beginning of the procedure, a drug, such as Photoditazine, is injected into the If confirmed by studies of basalioma, treatment with ointment is prescribed in courses for 2-3 weeks. Ointments for occlusive dressings are used locally: fluorouracil - 5% after pre-treatment of the skin with Dimexide; omaic (colhamic) - 0.5-5%; fluorofuric - 5-10%; podophyllinic - 5%; glycifone - 30%; prospidinova - 30-50%; metwix; curaderm; solcoseryl; as applications - colhamic (0.5%) with the same part of Dimexide.