NCT00470496 2022-07-25Photodynamic Therapy Using HPPH in Treating Patients Undergoing Surgery for Primary or Recurrent Head and Neck CancerRoswell Park Cancer InstitutePhase 1 Completed15 enrolled
NCT01682746 2019-02-25Photodynamic Therapy (PDT) for Recurrent Pediatric Brain TumorsMedical College of WisconsinPhase 1 Completed5 enrolled