- Arm II: Patients undergo radiotherapy in addition to chemotherapy with fluorouracil and cisplatin. Radiotherapy is given once a day, 5 days a week, for 6.5 weeks to the primary tumor and upper neck. Fluorouracil and cisplatin are administered by continuous infusion for 4 days beginning on day 1 of the first week of radiotherapy. A second course of fluorouracil and cisplatin is given on day 28.