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Abstract
Conclusion: The present study demonstrates the feasibility of VMAT in association with platin or cetuximab in HNSCC and reports VMAT-related acute and late toxicities for the first time. Objectives: New radiotherapy techniques, such as Volumetric Modulated Arc Therapy (VMAT) were developed to lower RT-related toxicity. The aim of the present study was to investigate acute and late toxicities of head and neck squamous cell carcinoma (HNSCC) patients treated using VMAT. Methods: This study investigated retrospectively all patients with HNSCC who received VMAT in curative intent. Results: From 2010–2013, 150 patients were treated. Seventy-five patients (50%) received concurrent chemotherapy with VMAT, 51 patients (34%) received VMAT alone and 24 patients (16%) received concurrent cetuximab with VMAT. Mean delivered dose to planning target volume tumor (PTV T), high risk nodes (PTV HNR), low risk nodes (PTV LNR) and prophylactic nodes (PTV PN) were: 65.2 Gy, 62.9 Gy, 55.4 Gy, and 51.5 Gy, respectively. PTV mean coverages were higher than 96.5%. Most common grade 3/4 acute infield toxicities were mucosis (n = 28, 19%), dysphagia (n = 24, 16%), and dermatitis (n = 24, 16%). With a median follow-up of 16.0 months, most common late toxicities were dysphagia (n = 30, 20%), xerostomia (n = 28, 19%), larynx stiff (n = 17, 11%), and skin fibrosis (n = 14, 9%).