The combination of oxaliplatin, 5FU, and radiation also have been used in a Phase I/II trial in esophageal cancer. In this particular trial, eligibility included therapeutically naïve esophageal cancer subjects with clinical disease stages II to IV. Initial doses and schedules for cycle 1 consisted of Oxaliplatin 85 mg/m2 on days 1, 15, and 29; continuous infusion of 5-FU 180 mg/m2 for 24 hours for 35 days; and RT 1.8 Gy in 28 fractions starting on day 8. At completion of cycle 1, eligible subjects could undergo an operation or begin cycle 2 without RT. Postoperative subjects were eligible for cycle 2. Stage IV subjects were allowed three cycles in the absence of disease progression. 38 subjects were treated (22 stage IV, 16 stage II-III). 38 eligible subjects received therapy: 22 non-invasively staged as IV and 16 non-invasively staged as IV and 16 non-invasively staged as II and III. 36 subjects completed cycle 1, 29 subjects started cycle 2, and 24 subjects completed cycle 2. The combined-modality therapy was well tolerated, but dose limiting toxicity (DLT) prevented Oxaliplatin and 5-FU escalation. No grade 4 hematologic toxicity was noted. Eleven grade 3 and two grade 4 clinical toxicities were noted in eight subjects. After cycle 1, 29 subjects (81%) had no cancer in the esophageal mucosa. 13 subjects underwent an operation with intent to resect the esophagus and 5 subjects (38%) exhibited pathologic complete responses. There was no surgical mortality. Only 1 subject developed post-operative tracheosphageal fistula.