A matched pair analysis of oncological outcomes in human papillomavirus‐negative oropharyngeal squamous cell carcinoma: Transoral surgery versus radiotherapy or concurrent chemoradiation
Alok Thakar, Smriti Panda, Aanchal Kakkar, Vishwajeet Singh, Chirom Amit Singh, Atul Sharma, Suman Bhasker, Padmavathi Krishnamurthy, Suresh C. Sharma
Abstract
BACKGROUND: With the termination of RTOG 1221, there remains a lacuna regarding the optimal treatment for human papillomavirus (HPV)-negative oropharyngeal squamous cell carcinoma (OPSCC). METHODS: Matched pair analysis with propensity score matching (PSM) between Arm I (transoral surgery [TOS] + risk-stratified adjuvant treatment) and Arm II (nonsurgical treatment - radiation/chemoradiation) in HPV(-) OPSCC. RESULTS: Unmatched comparison of Arm I (n = 57) and Arm II (n = 89) indicated significantly better overall survival (OS) and disease-free survival (DFS) for Arm I. PSM by matched pairs (n = 48, 24 each arm) indicated 5-year OS at 80% and 72.1%, respectively, for Arm I and II (p > 0.05) and corresponding DFS at 65.3% and 33.4% (p > 0.05). Subgroup analysis did not demonstrate statistical difference in outcomes in stage II and III, but stage IV tumors had significantly better outcomes in Arm I than Arm II (4-year OS: 100% vs. 21%, p = 0.04; DFS: 75% vs. 14.3%, p = 0.04). CONCLUSIONS: TOS +/- adjuvant was found to have oncological outcomes at par with nonsurgical modalities in stage I-III OPSCC, whereas a distinct survival advantage was noted in case of stage IV tumors.