Photodynamic laser therapy (PDT) uses a light-sensitizing agent (Photofrin) and a laser to kill abnormal cells.

In preparation for PDT, your physician will inject Photofrin into one of your veins. You will return about 48 hours later for an endoscopy. While you are sedated, an endoscope (a thin, flexible tube) will be inserted into your esophagus. A laser light at the end of the endoscope will activate the Photofrin, which will destroy the damaged tissue in your esophagus.

You may need a clean-up endoscopy a few days later to remove any remaining dead cells in the esophagus.

Photodynamic therapy will make your skin and eyes very sensitive to sunlight. Be sure to use sun protection and sunglasses for four to six weeks after the injection.

Conditions this treatment is offered for:

• Barrett esophagus
• Esophageal cancer