T-status and an oral fluoropyrimidine, S-1, adjuvant chemotherapy are prognostic factors in reduced-RADPLAT for resectable hypopharyngeal cancer

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Abstract

Conclusion: Reduced-RADPLAT for HPC achieved comparative survival and locoregional control rates with lower toxicities compared with concurrent chemoradiotherapies including original RADPLAT. S-1 adjuvant chemotherapy showed a survival benefit. Objectives: To evaluate the efficacy and toxicities of targeted intra-arterial (IA) infusion of cisplatin with concurrent radiotherapy with a reduced dose (reduced-RADPLAT) for resectable hypopharyngeal cancer (HPC). Methods: Between 1999–2012, 50 patients with stage II–IVA HPC primarily treated by reduced-RADPLAT were analyzed. They were treated by 2–5 courses of IA cisplatin infusion (100 mg per body) with simultaneous systemic infusion of sodium thiosulfate concurrent with conventional radiotherapy (66–70 Gy). After 2003, S-1, an oral fluoropyrimidine, adjuvant chemotherapy was administered to all eligible patients. Results: During a median follow-up of 48.6 months, the estimated 3- and 5-year overall survival (OS), progression-free survival (PFS), locoregional control, and laryngoesophageal dysfunction-free survival (LEDFS) rates were 76.0% and 62.0%, 58.0% and 50.0%, 66.0% and 62.0%, and 56.0% and 54.0%, respectively. Grade 3 toxicities were observed in 30.0%. No patient had grade 4 or higher toxicities. No patient required tube feeding or tracheotomy at 3 months after treatment. T4-lesions and S-1 administration were significant factors predicting poor and good OS, PFS, and LEDFS, respectively. © 2016 Informa UK Limited, trading as Taylor & Francis Group

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