NCT01035437 2012-07-02Study for Determination of Feasibility and Toxicity of Pre-Treatment With HPPH (2-1[1-Hexyloxyethyl]-2 Devinyl Pyropheophorbide-a) Photodynamic Therapy Prior to Chemoradiation in Non-Operable Patients With Obstructive Esophageal CancerRoswell Park Cancer InstitutePhase NA Withdrawn