T4 squamous cell carcinoma of the oral tongue without mandibular involvement: surgery or chemoradiotherapy?

OBJECTIVE: To investigate disease control and functional outcomes in patients with T4 squamous cell carcinoma of the oral tongue who had undergone surgery or definitive chemoradiotherapy. STUDY DESIGN: Records of all consecutive patients with T4 squamous cell carcinoma of the oral tongue treated radically between 1999 and 2010 at the Peter MacCallum Cancer Centre, Melbourne, Victoria, Australia, were retrospectively reviewed. RESULTS: Of 31 patients, 19 underwent surgery and 12 underwent definitive chemoradiotherapy. There were no significant differences between cohorts in terms of age, nodal involvement, or performance status. All patients had T4 disease on the basis of extrinsic muscle invasion; none had bone invasion. Disease outcomes at 5 years after surgery or chemoradiotherapy were not significantly different, including local control (61% vs 70%), progression-free rate (56% vs 55%), and overall survival (27% vs 40%). A higher proportion of patients in the chemoradiotherapy group had only mild impairment of speech and swallowing. CONCLUSIONS: Definitive chemoradiotherapy may be a reasonable alternative to surgery for patients with T4 squamous cell carcinoma of the oral tongue without bony invasion.