Patterns of Failure after Intensity Modulated Radiation Therapy (IMRT) and Chemotherapy for Patients with Nasopharyngeal Carcinoma

Purpose/Objective(s)To describe the patterns of local (L) and regional (R) failure (F) following IMRT for nasopharyngeal carcinoma (NPC) focusing on the spatial relationship between site of recurrence and both previously treated volumes and dose distributions, as part of internal IMRT quality assurance program.Materials/MethodsBetween January 2005 and December 2008, 70 consecutive non-metastatic NPC patients underwent IMRT at our Institution....