Photodynamic Therapy

Photodynamic therapy (PDT) is a treatment procedure that slows growth of tumors and/or cells with ultraviolet radiation damage with the aid of light, a light-activated drug, and oxygen. First, a special, photosensitizing drug is applied topically to the affected area(s) of skin. The drug is absorbed and settles in and around the atypical cells. Then a highly precise, narrow-wavelength beam of light -- a laser beam -- is aimed at the damaged skin; the  drug absorbs the light and produces oxygen, which destroys atypical cells. This method ensures minimal collateral damage by targeting only the atypical cells and helping to preserve normal skin.