(LAY-zer THAYR-uh-pee) 
Treatment that uses intense, narrow beams of light to cut and destroy tissue, such as cancer tissue. Laser therapy may also be used to reduce lymphedema (swelling caused by a buildup of lymph fluid in tissue) after breast cancer surgery.
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Laser treatment uses an intense, narrow beam of light to remove or destroy abnormal tissue. It is often used to treat precancers on the surface of the body, such as actinic keratosis, and may be used to treat some types of skin cancer.