Clinical Outcomes of Definitive and Postoperative Radiotherapy for Stage I-IVB Hypopharyngeal Cancer

Hypopharyngeal cancer is relatively rare disease and continues to have a poor prognosis. This study analyzed the efficacy and safety of radiotherapy for stage I-IVB hypopharyngeal cancer. Between 2000 and 2015, 72 patients were treated with definitive radiotherapy and 29 patients with stage IVA were treated with postoperative radiotherapy. With definitive radiotherapy, the 3-year locoregional control rates for stage I-II, III, IVA, and IVB disease were 89%, 74%, 51% and 0%, respectively. The 3-year overall survival rates for patients with stage I-II, III, IVA and IVB disease were 84%, 89%, 55% and 15%, respectively. In patients with stage IVA disease treated with postoperative radiotherapy, 3-year locoregional control and overall survival rates were 83% and 75%, respectively, which were significantly better than those treated with definitive radiotherapy. Definitive radiotherapy was effective for stage I-III disease. Surgery and postoperative radiotherapy improved the survival rate of patients with stage IVA hypopharyngeal cancer.