The role of postoperative chemoradiation for oropharynx carcinoma: A critical appraisal of the published literature and National Comprehensive Cancer Network guidelines |
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| Authors: | Parul Sinha MBBS MS Jay F. Piccirillo MD FACS CPI Dorina Kallogjeri MD MPH Edward L. Spitznagel PhD Bruce H. Haughey MBChB MS FACS FRACS |
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| Affiliation: | 1. Department of Otolaryngology‐Head and Neck Surgery, Washington University School of Medicine, St. Louis, Missouri;2. Clinical Outcomes Research Office, Washington University School of Medicine, St. Louis, Missouri;3. Department of Mathematics, Washington University in St. Louis, Missouri |
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| Abstract: | The National Comprehensive Cancer Network (NCCN) describes the presence of extracapsular spread and/or positive margins in oropharynx cancer (OPC) as an indication for the addition of chemotherapy to postoperative radiation. The guideline's category 1 consensus is based on what they term high‐level evidence. For this study, the authors performed a critical appraisal of the research upon which the NCCN guideline is based and assessed its relevance in the era of human papillomavirus (HPV)/p16‐positive OPC. Multiple shortcomings were identified, including patient exclusion after randomization and the use of unplanned subgroup analyses without multivariate adjustment, which undermined internal validity. Indeterminate HPV/p16 status limited external validity. Given the unique biology of HPV/p16‐positive tumors and the problems of internal and external validity, the authors concluded that the literature upon which the recommendation for the addition of chemotherapy to adjuvant radiation was based does not generate high‐level evidence, and its relevance for the postoperative management of patients with HPV/p16‐positive OPC remains unknown. Cancer 2015;121:1747–1754. © 2015 American Cancer Society. |
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| Keywords: | oropharynx cancer adjuvant chemoradiation National Comprehensive Cancer Network guideline critical appraisal extracapsular spread positive margins human papillomavirus |
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