J Cancer 2017; 8(13):2436-2441. doi:10.7150/jca.19421 This issue

Research Paper

HPV test results and histological follow-up results of patients with LSIL Cervical Cytology from the Largest CAP-certified laboratory in China

Baowen Zheng1*, Huaitao Yang2*, Zaibo Li 3, Guijian Wei1, Jia You1, Xiaoman Liang1, Chengquan Zhao4✉

1. Guangzhou Kingmed Diagnostics, Guangzhou, Guangdong 510330, P. R. China;
2. Department of Pathology, University Cincinnati College of Medicine, Cincinnati, OH 45219, USA;
3. Department of Pathology, Wexner Medical Center at Ohio State University, Columbus, OH 43210, USA;
4. Department of Pathology, Magee-Womens Hospital, University of Pittsburgh Medical Center, Pittsburgh, PA 15213, USA.
* Both authors made equal contributions to this paper.

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Zheng B, Yang H, Li Z, Wei G, You J, Liang X, Zhao C. HPV test results and histological follow-up results of patients with LSIL Cervical Cytology from the Largest CAP-certified laboratory in China. J Cancer 2017; 8(13):2436-2441. doi:10.7150/jca.19421. Available from https://www.jcancer.org/v08p2436.htm

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Background: Age-adjusted evaluations have explored the possible utility of (HPV test results in women with LSIL Pap. We investigated HPV test results and histopathologic follow-up results of LSIL patients from China's largest CAP-certified laboratory.

Methods: Patients with LSIL between 2011 and 2015 from the Guangzhou Kingmed Diagnostics were retrospectively retrieved and their hrHPV test results and histological follow-up results were collected and analyzed.

Results: LSIL result was identified in 37,895 cases from 2,206,588 Pap tests (1.7%) including 1,513,265 liquid-based cytology and 693,323 conventional Pap tests. The average of these women was 38.4 years (15-88). The LSIL reporting rate in women <30 years was significantly higher than that in women > 30 years (2.1% vs 1.7%). The age specific reporting LSIL rates declined with increased age. 8,014 of 37,895 (21.2%) women with LSIL cytology also had HC2 HPV test results. 75.8% of women with LSIL Pap tests were hrHPV+ and the HPV+ rates declined with increased age except in patients older than 60 years. Overall histopathologic diagnoses within 6 months after LSIL were identified in 5,987 of 37,895 patients at Guangzhou Kingmed Diagnostics. CIN2/3 was identified in 15.2% patients, CIN1 in 66.9%, negative in 14.9% patients. No invasive carcinoma was found in all patients. Of 8014 patients with LSIL Pap test and HPV testing results, 1727 patients had histological follow-up within 6 months after Pap cytology test and HPV testing. The detection rate of CIN2/3 was significantly higher in patients with positive HPV testing result than that in patients with negative HPV testing result (17.8% vs. 8.1%). Among patients with LSIL/HPV negative tests, CIN2/3 was detected in 1 of 30 (3.3%) women aged 50 years and above, appearing lower than those in women less than 50 years (8.0%, 28/351, P=0.357).

Conclusion: This is the largest histological follow-up study in women with LSIL Pap from China and the data are helpful in establishing a baseline for better understanding the status of cervical screening in China. The 85.1% positive predict value of LSIL Pap cytology for follow-up CIN lesion was within currently recognized benchmark ranges.

Keywords: cervical cytology, LSIL, HPV, CIN, Cervical cancer, China.