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Phototherapy dynamic uses a substance photosensibilisante (causing tissue susceptibility to certain lights), which is applied on the skin for a few hours before his exposure to a specific light (light blue or red).

The substance is applied to the skin form of a liquid or a cream that contains aminolevulinic acid (5-ALA-HCL) or methyl aminolevulinate (MAL). These substances are particularly photosensitising absorbed by diseased tissue and sebaceous glands.

Exposure to light blue or red is made with a lamp which turns on special substance that has permeated the fabrics. The activation of the substance causing the destruction photosensibilisante specific tissues that have absorbed.

The laboratory Galderma markets Metvixia ® cream in France, its use is indicated for the treatment of actinic keratoses (pre keratoses), basal cell carcinomas superficial outside face, and the maldie Bowen (intraépidermique epidermoid carcinoma). The cream Metvixia ® is applied to the treated area for three hours before lighting by red LED lights (Aktilite ®). The treatment protocol by Metvixia ® is detailed on a separate form. Metvixia ® has recently been available in France. Interest essential dynamic phototherapy with Metvixia ® (MAL-PDT) is the treatment of skin cancer, it can eliminate virtually no scar precancerous lesions of the skin and some cancers. This technique also allows us to treat multiple lesions. One or more treatments may be necessary.

The laboratory DUSA markets Levulan Kerastic ® in the United States and Canada, it is a liquid applied to the treatment area for 12 to 16 hours before it is activated by blue light (BLU-U ®). Phototherapy with dynamic 5-ALA (ALA-PDT) is also used to destroy actinic keratoses, but also in the treatment of acne and the field of aesthetics (treatment of brown spots and wrinkles). Levulan kerastick is not indicated for the treatment of skin cancers.