Jeffrey C Liu1,2, Shobha Parajuli3, Elizabeth Blackman2, Denise Gibbs2, Ashley Ellis4, Anna Hull5, J Robert Beck2, Veda Giri6, Patrick Iherjirka4, Jasvir S Khurana3, Camille R Ragin2. 1. Department of Otolaryngology - Head and Neck Surgery, Temple University School of Medicine, Philadelphia, Pennsylvania. 2. Cancer Prevention and Control Program, Fox Chase Cancer Center, Temple Health, Philadelphia, Pennsylvania. 3. Department of Pathology, Temple University School of Medicine, Philadelphia, Pennsylvania. 4. Department of Chemistry, The Lincoln University, Lincoln University, Philadelphia, Pennsylvania. 5. Department of Biology, The Lincoln University, Lincoln University, Philadelphia, Pennsylvania. 6. Division of Population Science, Department of Medical Oncology, Sidney Kimmel Cancer Center, Thomas Jefferson University, Philadelphia, PA.
Abstract
BACKGROUND: Most studies on human papillomavirus (HPV)-associated oropharyngeal squamous cell carcinoma (SCC) have been performed on white Americans. Our study examined the incidence of HPV in an African American oropharyngeal SCC cohort and its survival. METHODS: African American patients with oropharyngeal SCC in a combined tumor registry were identified. HPV16 testing was performed by polymerase chain reaction (PCR) from DNA extracted from tumor blocks. The p16 staining was performed using standard immunohistochemistry. RESULTS: Forty-four patients were identified for analysis. Seventy-three percent of the tumors were HPV-positive. Only 39% of the patients who were HPV-positive were also p16-positive. Survival between all 3 tumor types, patients who tested HPV-positive/p16, HPV-positive/p16-positive, and HPV-negative/p16-negative was significantly different (p = .03). HPV/p16 status was significant on univariate and multivariate analysis. CONCLUSION: HPV oropharyngeal SCC is strongly present in this African American cohort. Two thirds of the patients who were HPV-positive were p16-negative. Greater study is needed to explain the high p16 negativity among this HPV-positive oropharyngeal SCC African American cohort.
BACKGROUND: Most studies on human papillomavirus (HPV)-associated oropharyngeal squamous cell carcinoma (SCC) have been performed on white Americans. Our study examined the incidence of HPV in an African American oropharyngeal SCC cohort and its survival. METHODS: African American patients with oropharyngeal SCC in a combined tumor registry were identified. HPV16 testing was performed by polymerase chain reaction (PCR) from DNA extracted from tumor blocks. The p16 staining was performed using standard immunohistochemistry. RESULTS: Forty-four patients were identified for analysis. Seventy-three percent of the tumors were HPV-positive. Only 39% of the patients who were HPV-positive were also p16-positive. Survival between all 3 tumor types, patients who tested HPV-positive/p16, HPV-positive/p16-positive, and HPV-negative/p16-negative was significantly different (p = .03). HPV/p16 status was significant on univariate and multivariate analysis. CONCLUSION:HPV oropharyngeal SCC is strongly present in this African American cohort. Two thirds of the patients who were HPV-positive were p16-negative. Greater study is needed to explain the high p16 negativity among this HPV-positive oropharyngeal SCC African American cohort.
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