Adjuvant Postoperative Radiotherapy with or without Chemotherapy for Locally Advanced Squamous Cell Carcinoma of the Head and Neck: The Importance of Patient Selection for the Postoperative Chemoradiotherapy
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Purpose We wanted to evaluate the role of postoperative chemoradiotherapy (CRT) for patients with locally advanced squamous cell carcinoma of the head and neck (SCCHN). Materials and Methods From March 1993 to July 2008, 101 patients with advanced SCCHN and who had undergone macroscopically complete resection were enrolled. Survival and the cumulative incidence of local or regional relapse, metastasis, and acute toxicity were analyzed. Results There was a marginally significant difference of disease-free survival at five years in favor of the CRT arm (51.3% vs. 41.8%, respectively; p=0.10). However, there was no significant difference in overall survival between the two treatment arms (p=0.20). The rate of locoregional failure only for the radiotherapy arm was significantly higher than that for the CRT arm (23.2% vs. 4.4%, respectively; p=0.01). The incidence of grade 3 or 4 hematologic toxicity was significantly higher in the CRT arm than that in the radiotherapy arm (37.7% vs. 1.7%, respectively; p=0.01). In CRT arm, early mortality group within 1 year had low performance status and old age over sixty compared with those of the others. Conclusion After curative-intent surgery, adjuvant CRT is more effective in locoregional tumor control than radiotherapy alone for patients with advanced SCCHN. However,compared with radiotherapy alone, this combined modality treatment had no survival benefit, and was significantly associated with increased toxicity. Thus, patients with low performance status and old age must be cautious in selection of toxic trimodality treatment.
Abstract
Purpose We wanted to evaluate the role of postoperative chemoradiotherapy (CRT) for patients with locally advanced squamous cell carcinoma of the head and neck (SCCHN). Materials and Methods From March 1993 to July 2008, 101 patients with advanced SCCHN and who had undergone macroscopically complete resection were enrolled. Survival and the cumulative incidence of local or regional relapse, metastasis, and acute toxicity were analyzed. Results There was a marginally significant difference of disease-free survival at five years in favor of the CRT arm (51.3% vs. 41.8%, respectively; p=0.10). However, there was no significant difference in overall survival between the two treatment arms (p=0.20). The rate of locoregional failure only for the radiotherapy arm was significantly higher than that for the CRT arm (23.2% vs. 4.4%, respectively; p=0.01). The incidence of grade 3 or 4 hematologic toxicity was significantly higher in the CRT arm than that in the radiotherapy arm (37.7% vs. 1.7%, respectively; p=0.01). In CRT arm, early mortality group within 1 year had low performance status and old age over sixty compared with those of the others. Conclusion After curative-intent surgery, adjuvant CRT is more effective in locoregional tumor control than radiotherapy alone for patients with advanced SCCHN. However,compared with radiotherapy alone, this combined modality treatment had no survival benefit, and was significantly associated with increased toxicity. Thus, patients with low performance status and old age must be cautious in selection of toxic trimodality treatment.
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