Editorial: photodynamic therapy

In 1903, Von Tappeiner and Jesionek showed the efficacy of light treatment together with a photosensitizer and oxygen, which is so-called “photodynamic action”. Medically, photodynamic therapy (PDT) application is now extensively used, and PDT has been exploited to treat various oncological and non-oncological human diseases. This editorial provides an up-to-date brief review of “Photodynamic therapy” appearing in biomedicine and some recent studies related to this therapy. We summarize the various contributions highlighting new analytic approaches and updates related to photodynamic therapy. The editorial is dedicated to concise updates on general or specific arguments regarding the utility of photodynamic therapy.