Photodynamic therapy or PDT is a treatment for various kinds of diseases, such as early stage non-small cell lung cancer in patients who don’t want to have regular surgery for their cancer.
One article (1) looked at photodynamic therapy and the treatment of early stage non-small cell lung cancer. It noted that it can be used for those who cannot have surgery for their cancer because cancer has come back into the lungs after previous surgery, the patient has medical problems that make it impossible to have general anesthesia, or there are tumors in both of the patient’s lungs.
It also noted that PDT can be used along with conventional therapies for lung cancer and that it can be used more than once to treat cancer. PTD involves injecting a photosensitizing agent into the patient’s bloodstream. The photosensitizing agent makes the cancer cells more likely to respond to laser light treatment.
Source: 1.Photodynamic therapy for lung cancer. http://www.cancerresearchuk.org/about-cancer/type/lung-cancer/treatment/photodynamic-therapy-for-lung-cancer. Accessed 9/9/16.