This study is a randomized, double-blinded assessment of biologic efficacy of AdcuCD40L. The individuals enrolled in this study will be individuals with biopsy proven resectable esophageal carcinoma. The dose of the AdcuCD40L vector (administered endoscopically directly to the tumor) will be the highest tolerable dose (most likely 10^11 particle units) determined from Weill-IRB protocol #0011004683 dose escalation study.