Background: The foremost problems of nasopharyngeal carcinoma (NPC) management are high loco-regional remission, local recurrence and spreading rate post therapy. Photodynamic therapy (PDT) has been done for treatment of tumors less than 1 cm in size and depth in a very diffzcult location, where radical excision by surgery was not possible. The aim of th is study is determining 5-year-overall s…