Human Papillomavirus-16 DNA Quantitation Differentiates High-Grade Anal Neoplasia

Melissa Agsalda-Garcia, Tiffany Shieh, Eleanore Chuang, Nicholas Loi, Cris Milne, Rui Fang, Eunjung Lim, Jeffrey Killeen and Bruce Shiramizu
Additional contact information
Melissa Agsalda-Garcia: Hawaii Center for AIDS, Honolulu, HI 96813, USA
Tiffany Shieh: Hawaii Center for AIDS, Honolulu, HI 96813, USA
Eleanore Chuang: Hawaii Center for AIDS, Honolulu, HI 96813, USA
Nicholas Loi: Hawaii Center for AIDS, Honolulu, HI 96813, USA
Cris Milne: Hawaii Center for AIDS, Honolulu, HI 96813, USA
Rui Fang: Complementary and Integrative Medicine, John A. Burns School of Medicine, University of Hawaii, Honolulu, HI 96813, USA
Eunjung Lim: Complementary and Integrative Medicine, John A. Burns School of Medicine, University of Hawaii, Honolulu, HI 96813, USA
Jeffrey Killeen: University of Hawaii Cancer Center, Honolulu, HI 96813, USA
Bruce Shiramizu: Hawaii Center for AIDS, Honolulu, HI 96813, USA

IJERPH, 2018, vol. 15, issue 8, 1-8

Abstract: Background: Due to their higher rates of anal dysplasia/cancer, human immunodeficiency virus (HIV)-positive individuals are recommended to undergo anal dysplasia screening, which consists of anal cytology (AC) and high resolution anoscopy (HRA) with anal biopsy (AB) after abnormal AC result. However, AC variability limits its usefulness. Our objective was to evaluate human papillomavirus (HPV)-16 DNA quantitation as part of the screening algorithm. Methods: HPV-16 was detected in AC specimens from 75 HIV-positive participants using quantitative real-time polymerase chain reaction. AB results were available from 18/44 patients who had abnormal AC. Statistical tests included Mann-Whitney U, Kruskal-Wallis, receiver operating characteristic (ROC) analysis and Kappa coefficient tests. Results: HPV-16 copy numbers differed significantly across AC ( p = 0.001) and AB grades ( p = 0.009). HPV-16 ≥ 65 copies/cell predicted high-grade AB ( p = 0.04). Using this cut-off in comparison to AB, it had better specificity (1.00) than AC (0.75) and specificity (0.77) than qualitative HPV-16 detection (0.38). Also, the Kappa coefficient of the cut-off (κ = 0.649) was higher than AC (κ = 0.557) and qualitative HPV-16 detection (κ = 0.258) to AB. Conclusion: Higher HPV-16 copy numbers corresponded to higher AC and AB grades, suggesting the importance of HPV burden on disease stage. Furthermore, HPV-16 ≥ 65 copies/cell distinguished high-grade disease and demonstrated better sensitivity, specificity, and agreement with AB than AC or qualitative HPV-16 detection. These results support the potential use of HPV quantitation in conjunction with AC in anal dysplasia screening.

Keywords: human papillomavirus; HPV; HIV/AIDS; men who have sex with men; MSM; anal cancer; cytology; dysplasia (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2018
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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