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Clinical evaluation of HPV DNA test combined with liquid-based cytology in the diagnosis of cervical disease

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DOI: 10.4236/ojog.2013.33068    3,538 Downloads   5,520 Views   Citations

ABSTRACT

Objectives: To evaluate the sensitivity and accuracy of the HPV DNA test in conjunction with thin prep cytology test as a screening method of human papillomavirus (HPV) infection. To study either the cervical erosion is related to high risk HPV infection or to determine the mean age distribution that is more prone to HPV infection. Material and Methods: The study is a retrospective cohort implemented to determine the real performance of liquid based medium and HPV DNA testing combined in second clinical hospital of Jilin University Changchun, China. The study group included total 150 patients from January 1, 2011 to December 30, 2012. A computerized search identified patients with thin prep test results and high risk HPV DNA testing during a 2-year period was recruited. The patients were chosen after proper speculum examination followed by thin prep cytology (TCT) and HPV DNA test. Cytologic specimens were obtained with endocervical brush, which was rinsed into the vial of Cytyc. The residual samples after the cytology report were taken for reflex HPV DNA test. The manufacture protocol was followed for HPV DNA testing using Hybrid Capture II. Colposcopic biopsy was performed for the diagnosis purpose, in patients who had atypical squamous cells of undeter-mined significance (AUS-US), low grade intraepithelial lesion (LSIL) or high-grade intraepithelial lesion (HSIL) in cytology and with positive results of highrisk HPV DNA. The diagnostic criteria were based on the Bethesda System (TBS). Findings: The high risk HPV positive women with abnormal cytology had a CIN I risk of 73 (86%), whereas 35 (23.3%) high-risk HPV positive women out of 109 (72.7%) normal cytology who underwent histological biopsy had CIN I 16 (10.7%). The risk for cervical intraepithelial neoplasia (CIN) in women with high-risk HPV positive with normal cytology was higher among women invited for the first time 31 - 40 years of age 12 (8%) than among older women 1 (0.7%). Out of 44 (29.3%) women who had I degree erosion with 6 (14%) positive HPV DNA test 38 (86%) had a normal histology biopsy showing no statically significant between them. Conclusion: The data confirm that HR-HPV DNA testing is much more sensitive than cytology alone and that HPV DNA testing helps in identifying women with high risk of serious cervical disease in an efficient and medically acceptable manner. The other most significant advantage of this cervical cancer screening method is that women who are HPV DNA positive can easily and quickly referred for colposcopic examination (within one year), which could identify the precancerous and cancer stage. And those who are HPV DNA negative can safely have much longer screening intervals saving considerable costs. With mean age being 38 ± 10 years, age older than 30 years should undergo HPV DNA testing with cytology triage in primary screening. But in woman younger than 30 years using HPV DNA assay, as an initial screening step can increase the prevalence of abnormal smears and the positive predictive value of HPV followed by TCT. However, close follow-up is essential if the initial biopsy is negative because a considerable number of women may have HPV infection positive in subsequent studies.

Conflicts of Interest

The authors declare no conflicts of interest.

Cite this paper

Thakur, R. , Mally, J. , Shrestha, R. , Zheng, X. , Zhang, M. , Wu, Y. , Bajracharya, N. and Zheng, G. (2013) Clinical evaluation of HPV DNA test combined with liquid-based cytology in the diagnosis of cervical disease. Open Journal of Obstetrics and Gynecology, 3, 371-376. doi: 10.4236/ojog.2013.33068.

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