title: De-escalation of radiation dose for human papillomavirus-positive oropharyngeal head and neck squamous cell carcinoma: A case report and preclinical and clinical literature review.
abstract: Traditionally, head and neck squamous cell carcinoma (HNSCC) has been considered to be a relatively homogeneous disease. However, recent data have demonstrated that human papillomavirus (HPV)-positive and HPV-negative disease are two different clinical entities associated with different outcomes. Preclinical and clinical studies have reported a divergence in treatment strategies as well as prognostic outcomes for HNSCCs that are HPV-positive versus HPV-negative. The present study describes the case of a 52-year-old man who presented with stage IVB cT2N3M0 right tonsillar HPV-positive squamous cell carcinoma. Induction chemotherapy with docetaxel, cisplatin and 5-fluorouracil (TPF), followed by chemoradiation therapy with carboplatin and 70 Gray (Gy) radiation in daily fractions was recommended. The patient completed the TPF and carboplatin treatment; however, he was unable to tolerate the radiation course, receiving a final dose of 46 Gy. A 60-day follow-up right neck salvage dissection was subsequently performed. Despite having received a partial radiation treatment of 46 Gy, the patient had no pathological evidence of disease at 60 days post radiation treatment. Repeat positron emission tomography-computed tomography at 32 months after the right neck dissection revealed no evidence of disease. The present study also discusses the current preclinicalin vitroandin vivotargets for HPV-positive HNSCC and the obstacles presented in advancing clinical treatment modalities. Previous preclinical models investigating radiation sensitivity have yielded mixed results. Thus, it is important to understand and establish representative preclinical models for studying HPV and HNSCC to improve clinical research and therapeutic development. This review may guide future understanding of the role of HPV in HNSCC.
authors: Department of Radiation Oncology, Columbia University College of Physicians and Surgeons, New York, NY 10032, USA.
authors: Cheng-Chia
authors: CC
authors: Wu
authors: Department of Radiation Oncology, Columbia University College of Physicians and Surgeons, New York, NY 10032, USA.
authors: David P
authors: DP
authors: Horowitz
authors: Department of Radiation Oncology, Columbia University College of Physicians and Surgeons, New York, NY 10032, USA; Herbert Irving Comprehensive Cancer Center, Columbia University Medical Center, New York, NY 10032, USA.
authors: Israel
authors: I
authors: Deutsch
authors: Department of Otolaryngology-Head and Neck Surgery, Columbia University College of Physicians and Surgeons, New York, NY 10032, USA.
authors: Rahmatullah
authors: R
authors: Rahmati
authors: Department of Medical Oncology, Columbia University College of Physicians and Surgeons, New York, NY 10032, USA.
authors: Jordan M
authors: JM
authors: Schecter
authors: Herbert Irving Comprehensive Cancer Center, Columbia University Medical Center, New York, NY 10032, USA; Department of Pathology and Cell Biology, Columbia University College of Physicians and Surgeons, New York, NY 10032, USA.
authors: Anjali
authors: A
authors: Saqi
authors: Department of Radiation Oncology, Columbia University College of Physicians and Surgeons, New York, NY 10032, USA; Herbert Irving Comprehensive Cancer Center, Columbia University Medical Center, New York, NY 10032, USA.
authors: Tony J C
authors: TJ
authors: Wang
keywords: de-escalation; head and neck squamous cell carcinoma; human papillomavirus; oropharyngeal; radiation