Background
The objective of this study was to examine the prevalence of human papillomavirus 16/18 (HPVâ16/18) genotypes and immediate histopathologic correlations in a Chinese population with negative cytology and positive highârisk human papillomavirus (hrHPV) testing.
Methods
Patients who had documented negative cytology with immediate followâup (within the 6 months after negative for intraepithelial lesion or malignancy Papanicolaou [Pap] testing), including a histopathologic examination and/or hrHPV testing, between 2011 and 2018 were included, and the data were analyzed.
Results
Among 1,424,182 Pap tests, 1,333,453 (93.6%) were interpreted as negative cytology. Although conventional Pap smears had the highest reporting rate, cervical intraepithelial neoplasia 2 and higher (CINâ2+) lesions were detected significantly more with liquidâbased cytology preparations (2.1%) than the conventional method (1.4%; PÂ <Â .01). The overall hrHPVâpositive rate was 14.9% (25,507 of 171,273) in the women with negative cytology. Among the 18,423 cytologyânegative, HPVâpositive cases tested with the Cobas assay, the overall HPVâ16/18 prevalence was 24.7%, with 17.9% being HPVâ16âpositive, 6.2% being HPVâ18âpositive, and 0.6% being positive for both HPVâ16 and HPVâ18. The immediate histopathologic examination was documented for 21,796 women with cotesting results, including 8915 HPVâpositive cases and 12,881 HPVânegative cases. CINâ2+ lesions were diagnosed in 15.2% of the HPVâ16âpositive cases; this rate was significantly higher than the rates seen in the HPVâ18âpositive cases (4.8%) and the cases positive for 1 of the other 12 types of HPV (3.0%).
Conclusions
This is by far the largest routine clinical practice report of HPVâ16/18 genotyping and histopathologic examination in negativeâcytology women and the first report of such an investigation in the Chinese population. This study indicates enhanced risk stratification with HPVâ16/18 genotype testing in HPVâpositive, cytologyânegative women in the Chinese population.