Zhuang Sun1,2,3,4, Jingyun Wang1,2,3,4, Runda Huang1,2,3,4, Xiaohui Wang1,2,3,4, Chunyan Chen1,2,3,4, Meiling Deng1,2,3,4, Chong Zhao2,3,4,5, Hanyu Wang1,2,3,4, Fei Han1,2,3,4. 1. Department of Radiation Oncology, Sun Yat-sen University Cancer Center, Guangzhou, China. 2. State Key Laboratory of Oncology in South China, Guangzhou, China. 3. Collaborative Innovation Center for Cancer Medicine, Guangzhou, China. 4. Guangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and Therapy, Guangzhou, China. 5. Department of Nasopharyngeal Carcinoma, Sun Yat-sen University Cancer Center, Guangzhou, China.
Abstract
PURPOSE: To explore the feasibility of contralateral lower neck sparing radiotherapy for patients with stage N1 nasopharyngeal carcinoma (NPC) by analyzing long-term survival outcomes and late toxicities. METHODS: Data of patients with stage N1 NPC who were treated with contralateral lower neck sparing radiotherapy between January 2013 and December 2015 were analyzed. These patients were all staged by magnetic resonance imaging (MRI), and all received irradiation to the upper neck (levels II, III, and Va) bilaterally along with ipsilateral levels IV and Vb, without irradiation of the contralateral lower neck. Treatment outcomes, regional failure patterns, and late toxicities were examined. RESULTS: A total of 275 eligible patients with stage N1 NPC were included in the present study. The median follow-up period was 62 months (range, 3-93 months). The 5-year overall survival (OS), distant metastasis-free survival (DMFS), local recurrence-free survival (LRFS), regional recurrence-free survival (RRFS), locoregional recurrence-free survival (LRRFS), and progression-free survival (PFS) rates were 90.5, 91.3, 94.7, 95.3, 91.2, and 81.7%, respectively. A total of 13 patients (4.7%) developed regional recurrence, all of which occurred in the field and not out of the field. Among 254 patients with available data on late toxicities, the most common late toxicity was xerostomia. No late injuries occurred in the carotid arteries, brachial plexus, or spinal cord. In addition to one case (0.4%) of neck fibrosis and three cases (1.2%) of hearing loss, there were no other grade 3-4 late toxicities observed. CONCLUSIONS: Contralateral lower neck sparing radiotherapy would be safe and feasible for patients with stage N1 NPC, with the potential to improve the long-term quality of life of patients.
PURPOSE: To explore the feasibility of contralateral lower neck sparing radiotherapy for patients with stage N1 nasopharyngeal carcinoma (NPC) by analyzing long-term survival outcomes and late toxicities. METHODS: Data of patients with stage N1 NPC who were treated with contralateral lower neck sparing radiotherapy between January 2013 and December 2015 were analyzed. These patients were all staged by magnetic resonance imaging (MRI), and all received irradiation to the upper neck (levels II, III, and Va) bilaterally along with ipsilateral levels IV and Vb, without irradiation of the contralateral lower neck. Treatment outcomes, regional failure patterns, and late toxicities were examined. RESULTS: A total of 275 eligible patients with stage N1 NPC were included in the present study. The median follow-up period was 62 months (range, 3-93 months). The 5-year overall survival (OS), distant metastasis-free survival (DMFS), local recurrence-free survival (LRFS), regional recurrence-free survival (RRFS), locoregional recurrence-free survival (LRRFS), and progression-free survival (PFS) rates were 90.5, 91.3, 94.7, 95.3, 91.2, and 81.7%, respectively. A total of 13 patients (4.7%) developed regional recurrence, all of which occurred in the field and not out of the field. Among 254 patients with available data on late toxicities, the most common late toxicity was xerostomia. No late injuries occurred in the carotid arteries, brachial plexus, or spinal cord. In addition to one case (0.4%) of neck fibrosis and three cases (1.2%) of hearing loss, there were no other grade 3-4 late toxicities observed. CONCLUSIONS: Contralateral lower neck sparing radiotherapy would be safe and feasible for patients with stage N1 NPC, with the potential to improve the long-term quality of life of patients.
Authors: Lachlan J McDowell; Kathy Rock; Wei Xu; Biu Chan; John Waldron; Lin Lu; Shereen Ezzat; David Pothier; Lori J Bernstein; Nathaniel So; Shao Hui Huang; Meredith Giuliani; Andrew Hope; Brian O'Sullivan; Scott V Bratman; John Cho; John Kim; Raymond Jang; Andrew Bayley; Jolie Ringash Journal: Int J Radiat Oncol Biol Phys Date: 2018-06-04 Impact factor: 7.038
Authors: Nancy Y Lee; Qiang Zhang; David G Pfister; John Kim; Adam S Garden; James Mechalakos; Kenneth Hu; Quynh T Le; A Dimitrios Colevas; Bonnie S Glisson; Anthony Tc Chan; K Kian Ang Journal: Lancet Oncol Date: 2011-12-15 Impact factor: 41.316
Authors: K S Clifford Chao; Franz J Wippold; Gokhan Ozyigit; Binh N Tran; James F Dempsey Journal: Int J Radiat Oncol Biol Phys Date: 2002-08-01 Impact factor: 7.038