PHOTODYNAMIC THERAPY (PDT)
PDT is a treatment for some cancers and and conditions that may develop into a cancer. It can also be used for cosmetic treatments.
How PDT works
PDT uses laser or other light sources, combined with a light-sensitive drug (sometimes called a photosensitising agent) to destroy skin cancer cells .
A photosensitising agent is a drug that makes cells more sensitive to light. The drug is attracted to cancer cells. It does not become active until it is exposed to a particular type of light. When the light is directed at the area of the cancer, the drug is activated and the cancer cells are destroyed. Some healthy, normal cells in the body will also be affected by PDT, but these cells will usually heal after the treatment.
Range of Conditions treated:
· Non Hyperkeratotic keratoses
· Seborrhoeic Keratoses
· Cystic acne, acne vulgaris and generally oily skin
· Hypertrophic Leions
· Sebaceous gland hyplerplasia
· Hidradentitis suppurtivia
· Uneven Skin Tone
· Large Pores
· Fine Lines
ULTRAVIOLET LIGHT THERAPY (UVB)
Ultraviolet light treatment uses a particular band of the nonvisible light spectrum to treat psoriasis and a variety of other skin diseases. It can be used alone or in combination with other medications applied directly to the skin or taken internally.
Ultraviolet (UV) light treatment is used primarily in cases of severe psoriasis that have not responded to other medications or in cases affecting large portions of the body. Patients will typically receive a series of 3-5 weekly treatments for a month or more to bring their psoriasis symptoms into check. They may also receive periodic maintenance treatments to prevent recurrence of their psoriasis. Other skin conditions treated with UV light treatments are vitiligo, a condition in which people lose pigmentation in large patches of their skin, and atopic dermatitis, an allergy-related skin condition that produces itchy, reddish, and scaly patches of skin.
Exposure to UV radiation is known to prematurely age the skin over time and increase the risk of skin cancer. These potential effects should be weighed against the potential benefits of the treatment. A history will be taken regarding sun exposure and burning, medications, such as diuretics, that may increase UV sensitivity exposure, and any history of skin cancers. Sometimes, UV light treatments are given in combination with photosensitizing agents, which maximize UV's effects on the skin. Patients who receive these agents, called psoralens, must take care to avoid exposure to sunlight, which also contains UV radiation. Exposure to UV radiation can also cause cataracts and other eye damage, so the patient's eyes must be adequately shielded during the treatments.