- Arm A: Patients receive neoadjuvant radiotherapy once daily, 5 days a week, for 5 weeks beginning on day 1 concurrently with neoadjuvant chemotherapy comprising cisplatin IV (Intravenous) over 2-3 hours followed by irinotecan IV over 30-60 minutes once daily on days 1, 8, 22, and 29. Four to six weeks after completion of neoadjuvant chemoradiotherapy, patients undergo surgical resection. A minimum of 4 weeks after resection, patients receive adjuvant chemotherapy comprising cisplatin and irinotecan as above on days 1 and 8. Treatment with adjuvant chemotherapy repeats every 3 weeks for 3 courses.