Transoral robotic surgery and adjuvant therapy for oropharyngeal carcinomas and the influence of p16 INK4a on treatment outcomes

The Laryngoscope
Harry QuonBert W O'Malley

Abstract

To determine the prognostic influence of p16(INK4a) immunohistochemistry on the survival of resectable oropharyngeal carcinomas (OPSCC). Retrospective pathologic evaluation of a prospective single-arm cohort study at a tertiary referral center. There were 48 patients with resectable OPSCC who consented for transoral robotic surgery (TORS) and banked tissue specimen for assessment. TORS was with or without adjuvant radiation or chemoradiation. Main outcome measures were p16(INK4a) status, human papillomavirus status, local-regional disease control, and overall, disease-specific, and disease-free survival. p16(INK4a) and HPV positivity were identified in 73% and 74% of patients respectively. With a median follow-up of 38.8 months (2.5-63.3 months), only one local-regional relapse has occurred in both the p16(INK4a)-positive and p16(INK4a) -negative cohorts. No disease-specific, disease-free, and overall survival differences were observed between p16(INK4a) -positive and p16(INK4a)-negative patients (P = .446, P = .277, P = .643, respectively). p16(INK4a) was not prognostic in resectable OPSCC when treated with an initial TORS approach.

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