Oncology Research and Treatment
Yuan J.-J. · Zhang X. · Ding J.-W. · Zhang S.-H. · Zhang Z.-L. · Hu R.-H. · Gong D. · Hu J.-L. · Tu Z.-W. · Zeng L.Log in to MyKarger to check if you already have access to this content.
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Article / Publication Details AbstractObjective: To investigate clinical evidence for defining the indications of prophylactic level IB radiotherapy in nasopharyngeal carcinoma (NPC). Methods: We conducted a phase 2 prospective study in 116 newly diagnosed patients with NPC treated by intensity-modulated radiotherapy (IMRT). Whether level IB was irradiated based on the risk score model (RSM). Two groups based on RSM were obtained: low risk and high risk. Omission of level IB irradiation was conducted in low risk group, otherwise level IB was contoured as part of the treatment target. Grade 2 or worse xerostomia at 12 months was assessed by the European Organization for Research and Treatment of Cancer (EORTC) QLQ-H&N35 questionnaire. Results: At a median follow-up of 16months (range, 1-26 months). None patients developed failures at level IB. The 1-year overall survival (OS), locoregional recurrence-free survival (LRRFS) and distant metastasis-free survival (DMFS) rates were 98.3%, 97.2% and 95.8%, respectively. At 12 months xerostomia side-effects were reported 90 of 126 alive patients, grade 2 or worse xerostomia at 12 months was significantly lower in the low risk group than in the high risk group. Conclusion: Omission of level IB irradiation was feasible for patients with low-risk IB lymph nodes metastasis.
S. Karger AG, Basel
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