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Conclusions. This regimen of concurrent chemoradiotherapy was safe and well tolerated. In terms of larynx preservation, the present regimen appears to be useful for patients with advanced resectable squamous cell carcinoma (SCC) of the larynx and hypopharynx. Objectives. To evaluate the efficacy and toxicity of concurrent chemoradiotherapy in patients with advanced resectable SCC of the larynx and hypopharynx, and to demonstrate the feasibility of larynx preservation. Patients and methods. Forty-six eligible patients were treated. The chemotherapy regimen consisted of a combination of four drugs: cisplatin (60 mg/m2, day 4), 5-fluorouracil (5-FU) (600 mg/m2 given continuously for 120 h, days 1–5), methotrexate (MTX) (30 mg/m2, day 1), and leucovorin (LV) (20 mg/m2, days 1–5). Two cycles of this regimen were given every 4 weeks during radiotherapy. Radiotherapy was delivered 5 days a week using a single daily fraction of 1.8–2.0 Gray, to a total dose of 66.6–70.2 Gray. Results. The 3-year disease-specific survival rates of patients with laryngeal or hypopharyngeal SCC were 81.3% and 78%, respectively. The 3-year disease-specific survival rates with larynx preservation of patients with laryngeal or hypopharyngeal SCC were 46.7% and 59%, respectively. The main toxicities were neutropenia, dermatitis, mucositis, and infection. [ABSTRACT FROM AUTHOR]