Combination Chemotherapy and Radiation in Treating Patients With Stage III or IV Head and Neck Cancer (Paradigm Trial)

RATIONALE: Drugs used in chemotherapy, such as docetaxel, cisplatin, fluorouracil, and carboplatin, work in different ways to stop tumor cells from dividing so they stop growing or die. Radiation therapy uses high-energy x-rays to damage tumor cells. Combining chemotherapy with radiation therapy may kill more tumor cells. It is not yet known which regimen of chemotherapy and radiation therapy is most effective in treating head and neck cancer. PURPOSE: Randomized phase III trial to compare the effectiveness of two different regimens of chemotherapy and radiation therapy in treating patients who have stage III or stage IV head and neck cancer.