Abstract 1572: The value of p16 or HPV as predictive marker of anti-EGFR treatment in recurrent/metastatic HNSCC

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Abstract Introduction: The anti-epidermal growth factor receptor (EGFR) agent was approved and has been a mainstay of treatment of recurrent/metastatic head and neck squamous cell cancers (HNSCC). However, it is unclear whether human papilloma virus (HPV) modulates the response to targeting the EGFR. Some subset analysis of the randomized phase III study is confusing and recent The Cancer Genome Atlas data showed that EGFR gene is rarely abnormal in HPV-positive HNSCC tumors while it is frequently altered in HPV-negative HNSCC tumors. The purpose of our meta-analysis is to evaluate the effects of anti-EGFR agents regarding HPV status. Materials and Methods: We conducted a pooled analysis to evaluate the association of p16 expression status with outcomes in patients with recurrent/metastatic HNSCC receiving palliative anti-EGFR treatment with or without chemotherapy. A literature search of PubMed, EMBASE, and meeting abstracts of the American Society of Clinical Oncology and European Society of Medical Oncology through December 2017 was conducted. Results: A total of seven trials met the selection criteria. The total number of patients was 700 (554 with the HPV-negative group and 146 with the HPV-positive group). Anti-EGFR treatment was associated with higher response rate in p16-negative patients compared with in p16-positive patients (OR 2.18; 95% CI, 1.18-3.99, p=0.01). Conclusion: A meta-analysis of trials with anti-EGFR agents in p16-negative RMHNSCC patients versus in p16-positive recurrent/metastatic HNSCC patients yielded that p16 status could be a predictive biomarker for anti-EGFR treatment in recurrent/metastatic HNSCC. Prospective study is warranted to determine the value of p16 or HPV as a predictive marker of anti-EGFR treatment in recurrent/metastatic HNSCC. Citation Format: Joo Han Lim, Soon-Sun Hong, Jin-Chul Kim, Moon Hee Lee, Jinhyun Cho. The value of p16 or HPV as predictive marker of anti-EGFR treatment in recurrent/metastatic HNSCC [abstract]. In: Proceedings of the American Association for Cancer Research Annual Meeting 2018; 2018 Apr 14-18; Chicago, IL. Philadelphia (PA): AACR; Cancer Res 2018;78(13 Suppl):Abstract nr 1572.