RT Book, Section A1 Togsverd-Bo, Katrine A1 Haedersdal, Merete A2 Avram, Marc R. A2 Avram, Mathew M. A2 Ratner, Désirée SR Print(0) ID 1175094909 T1 Photodynamic Therapy for Nonmelanoma Skin Cancer and Precursor Lesions T2 Procedural Dermatology YR 2015 FD 2015 PB McGraw-Hill Education PP New York, NY SN 9780071795067 LK dermatology.mhmedical.com/content.aspx?aid=1175094909 RD 2024/11/03 AB Photodynamic therapy (PDT) is increasingly used in both USA and Europe for the treatment of actinic keratosis (AK) and selected cases of nonmelanoma skin cancer (NMSC). Being a minimally invasive therapy, PDT is especially suitable for the treatment of multiple lesions, field cancerization and lesions located in areas where optimal cosmetic outcome is essential.1,2 The principle of PDT involves the combination of a photosensitizer, oxygen, and light to produce selective cytotoxic damage of dysplastic cells. In dermatology, PDT is used with a topically applied photosensitizer, which allows for specific lesion targeting.