2016/05/06 by R Chin, Christopher Spencer, T.A. DeWees +9 · 1 citation
Medicine · #Head and Neck Cancer Studies #Esophageal Cancer Research and Treatment #Head and Neck Surgical Oncology
paper · doi:10.1002/hed.24486
openalex publication_date 2016/05/06 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/29
BACKGROUND: The purpose of this study was to compare outcomes of patients with p16-positive oropharyngeal squamous cell carcinoma (SCC) treated with postoperative intensity-modulated radiotherapy (IMRT) before and after an institutional dose reduction policy effective on February 2009. METHODS: Between 1998 and 2013, 175 consecutive patients with p16-positive oropharyngeal SCC with extracapsular extension (ECE) and/or close or positive margins were treated postoperatively to 66 Gy (n = 109) or 60 Gy (n = 66) in 2 Gy/fx. RESULTS: Between the 66 and 60 Gy groups, there was no difference in tumor classification (pT4 vs pT1-T3; p = .181) and nodal classification (pN2c-N3 vs pN0-N2b; p = .704), and American Joint Committee on Cancer (AJCC) group stage (IV vs I-III; p = .473). Median follow-up was 5.9 years overall (66 Gy: 7.4 years; 60 Gy: 4.0 years). There was no difference in locoregional recurrence-free survival (2-year: 98.1% vs 98.5%; p = .421). CONCLUSION: This study suggests that treating p16-positive oropharyngeal SCC with ECE and/or close or positive margins with postoperative IMRT to 60 Gy may not compromise locoregional recurrence-free survival compared to 66 Gy. © 2016 Wiley Periodicals, Inc. Head Neck 38: 1708-1716, 2016.