- Arm I: Patients receive cisplatin and fluorouracil every 3 weeks. Patients with a complete or partial response on day 42 receive 2 additional courses of chemotherapy followed by 7 weeks of radiotherapy beginning on day 80. After radiotherapy, patients with a complete remission enter follow-up; those with a partial remission proceed to surgery. Patients with stable or progressive disease proceed immediately to surgery with or without postoperative radiotherapy.