Abstract
Although excellent long-term local control can be achieved by radiation therapy (RT) for nasopharyngeal carcinoma (NPC), local recurrence remains a major cause of treatment failure. Modern RT technique of three-dimensional conformal radiation therapy (3D-CRT) including intensity modulated radiation therapy (IMRT) may improve the therapeutic ratio by reducing doses to normal tissue. The aim of this study is to evaluate the efficacy and prognostic factors in patients with locally recurrent NPC who were re-irradiated using modern radiation therapy techniques.
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