Phase II Study Evaluating Radiotherapy-chemotherapy and Cetuximab in Patients With Histologically Proven Squamous Cell Carcinoma of the Oral Cavity, Oropharynx, Hypopharynx, or Larynx and With a Poor Prognosis After Complete Surgical Resection

RATIONALE: Drugs used in chemotherapy, such as cisplatin, work in different ways to stop the growth of tumor cells, either by killing the cells or by stopping them from dividing. Radiation therapy uses high-energy x-rays to kill tumor cells. Monoclonal antibodies, such as cetuximab, can block tumor growth in different ways. Some block the ability of tumor cells to grow and spread. Others find tumor cells and help kill them or carry tumor-killing substances to them. Giving chemotherapy together with radiation therapy and cetuximab may kill more tumor cells.

PURPOSE: This phase II trial is studying how well chemotherapy given together with radiation therapy and cetuximab works in treating patients with head and neck cancer.