Matched-pair analysis of patients with advanced hypopharyngeal cancer: surgery versus concomitant chemoradiotherapy.

Abstract

The aim of this study was to compare the therapeutic outcomes of total pharyngolaryngectomy with those of concomitant chemoradiotherapy in advanced hypopharyngeal cancer. This is a retrospective multi-institutional study. The medical records of 979 patients with hypopharyngeal cancer, who were initially treated between 2006 and 2008, were reviewed. In this study, we matched a group of total pharyngolaryngectomy patients with a second group of chemoradiotherapy patients, according to age, gender, subsite, arytenoid fixation, cartilage invasion, and N classification, and analyzed overall survival, disease-specific survival, and locoregional control rates. The matched-pair analysis included 254 patients. The 5-year overall survival, disease-specific survival, and locoregional control rates were 58.5% and 53.5% (P=0.30), 68.9% and 68.0% (P=0.80), and 82.2% and 63.6% (P<0.01), respectively, for patients in the total pharyngolaryngectomy and chemoradiotherapy groups. For T4a patients with cartilage invasion, the matched-pair analysis included 46 patients. The 5-year overall survival, disease-specific, and locoregional control rates were 56.5% and 26.0% (P=0.092), 56.5% and 41.3% (P=0.629), and 43.0% and 42.5% (P=0.779), respectively, for patients in the total pharyngolaryngectomy and chemoradiotherapy groups. The data from this large-scale multi-institutional joint research program of hypopharyngeal cancer in Japan suggest that chemoradiotherapy may provide adequate survival benefit for hypopharyngeal cancer patients with the distinct advantage of larynx preservation. Our data also suggest that chemoradiotherapy is as beneficial as total pharyngolaryngectomy for the local control of locally advanced hypopharyngeal cancer.