Abstract
Background
Homosexual men infected with human immunodeficiency virus (HIV) are at increased risk of developing anal cancer. The aim of this study was to assess the clinical sensitivity of anal cytology analysis and oncogenic human papillomavirus (HPV) detection for predicting histological anal intraepithelial neoplasia.
Methods
Between March 2011 and December 2013, we enrolled 196 HIV-positive men in Taoyuan General Hospital, Taiwan. We analyzed the results of thin-preparation anal Pap smears, HPV genotyping, and histology of anoscopic biopsy samples.
Results
The mean age (±standard deviation) was 31.43 (±8.74) years. The proportion (95 % confidence interval) with abnormal thin-preparation anal cytology was 36.2 % (29.8–43.2 %): 16.8 % (12.2–22.7 %) atypical squamous cells of undetermined significance, 14.8 % (10.5–20.4 %) low-grade squamous intraepithelial lesions, and 4.6 % (2.4–8.5 %) high-grade squamous intraepithelial lesions. At least one HPV genotype was detected in 90.8 % of subjects, and the mean number of HPV infection types was 4.41 (±3.24).The frequency of histological high-grade anal intraepithelial lesions was 7.14 % (95 % confidence interval 4.3–11.6 %). Anal cytology yielding atypical squamous cells of undetermined significance or higher grades resulted in a sensitivity of 64.3 %, specificity of 65.9 %, positive predictive value of 12.7 %, and negative predictive value of 96 %. Using both oncogenic HPV and cytology did not provide better performance.
Conclusions
Anal cytology yielding atypical squamous cells of undetermined significance or higher grades could detect two-thirds of high-grade anal intraepithelial neoplasias in HIV-infected men and should be promoted for anal cancer prevention.
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Acknowledgments
This study was supported by grants PTH-10019, 10105, and 10203 from the Taoyuan General Hospital, Ministry of Health and Welfare, Taoyuan, Taiwan. We thank the participants for their time.
Conflict of interest
The authors declare that they have no conflict of interest.
Ethical standard
The study was approved by the institutional review boards of this hospital (IRB No: TYGH99034, 10020, and 101042) and all participants were enrolled with informed consent.
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Cheng, SH., Wang, CC., Chang, SL. et al. Oncogenic human papillomavirus is not helpful for cytology screening of the precursor lesions of anal cancers in Taiwanese men who are infected with human immunodeficiency virus. Int J Clin Oncol 20, 943–951 (2015). https://doi.org/10.1007/s10147-015-0804-9
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DOI: https://doi.org/10.1007/s10147-015-0804-9