Concurrent Chemoradiotherapy With Cisplatin Versus Cetuximab for Squamous Cell Carcinoma of the Head and Neck


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Abstract

Objectives:We previously reported inferior outcomes for locally advanced head and neck cancer treated with cetuximab (C225) versus cisplatin (CDDP). We now examine if this difference persists when accounting for HPV status and update outcomes on the entire cohort.Materials and Methods:From 3/106 to 4/1/08, 174 locally advanced head and neck cancer patients received definitive treatment with RT and CDDP (n=125) or RT and C225 (n=49). Of these, 62 patients had tissue available for HPV analysis.Results:The median follow-up was 47 months. The 3-year loco-regional failure, disease-free survival, and overall survival for CDDP versus C225 were 5.7% versus 40.2% (P<0.0001), 85.1% versus 35.4% (P<0.0001), and 90.0% versus 56.6% (P<0.0001), respectively. In the subset with tissue, there was no difference in rates of HPV or p16 positivity between the 2 groups. In this subset, the 3-year loco-regional failure, disease-free survival, and overall survival for CDDP versus C225 were 5.3% versus 32.0% (P=0.01), 86.8% versus 43.2% (P=0.002), and 86.7% versus 76.9% (P=0.09), respectively. Multivariate analysis continued to show a benefit for CDDP.Conclusions:With longer follow-up and the inclusion of HPV and p16 status for about one third of patients where tissue was available, we continued to find superior outcomes with concurrent CDDP versus C225.

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