OUTLINE: Randomized study. Arm I: Radiotherapy plus 2-Drug Combination Chemotherapy/Radiosensitization. Tumor irradiation using megavoltage photons of at least 6 MV (electrons may be used if required to boost supraclavicular fossa dose); plus Cisplatin, CDDP, NSC-119875; Fluorouracil, 5-FU, NSC-19893. High-dose radiotherapy. Arm II: Radiotherapy plus 2-Drug Combination Chemotherapy/Radiosensitization. Tumor irradiation as in Arm I; plus CDDP/5-FU. Conventional-dose radiotherapy.