p16/Ki-67 dual-stained cytology for detecting cervical (pre)cancer in a HPV-positive gynecologic outpatient population

Mod Pathol. 2016 Aug;29(8):870-8. doi: 10.1038/modpathol.2016.80. Epub 2016 May 6.

Abstract

Women who test positive for a high-risk type of the human papillomavirus (HPV) require triage testing to identify those women with cervical intraepithelial neoplasia grade 3 or cancer (≥CIN3). Although Pap cytology is considered an attractive triage test, its applicability is hampered by its subjective nature. This study prospectively compared the clinical performance of p16/Ki-67 dual-stained cytology to that of Pap cytology, with or without HPV16/18 genotyping, in high-risk HPV-positive women visiting gynecologic outpatient clinics (n=446 and age 18-66 years). From all women, cervical scrapes (for Pap cytology, HPV16/18 genotyping, and p16/Ki-67 dual-stained cytology) and colposcopy-directed biopsies were obtained. The sensitivity of p16/Ki-67 dual-stained cytology for ≥CIN3 (93.8%) did neither differ significantly from that of Pap cytology (87.7%; ratio 1.07 and 95% confidence interval (CI): 0.97-1.18) nor from that of Pap cytology combined with HPV16/18 genotyping (95.1%; ratio 0.99 and 95% CI: 0.91-1.07). However, the specificity of p16/Ki-67 dual-stained cytology for ≥CIN3 (51.2%) was significantly higher than that of Pap cytology (44.9%; ratio 1.14 and 95% CI: 1.01-1.29) and Pap cytology combined with HPV16/18 genotyping (25.8%; ratio 1.99 and 95% CI: 1.68-2.35). After exclusion of women who had been referred because of abnormal Pap cytology, the specificity of p16/Ki-67 dual-stained cytology for ≥CIN3 (56.7%) remained the same, whereas that of Pap cytology (60.3%) increased substantially, resulting in a similar specificity of both assays (ratio 0.94 and 95% CI: 0.83-1.07) in this sub-cohort. In summary, p16/Ki-67 dual-stained cytology has a good clinical performance and is an interesting objective microscopy-based triage tool for high-risk HPV-positive women.

Publication types

  • Comparative Study
  • Multicenter Study
  • Observational Study
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adolescent
  • Adult
  • Aged
  • Cervical Intraepithelial Neoplasia / chemistry
  • Cervical Intraepithelial Neoplasia / diagnosis*
  • Cervical Intraepithelial Neoplasia / pathology
  • Cervical Intraepithelial Neoplasia / virology
  • Cyclin-Dependent Kinase Inhibitor p16 / analysis*
  • Female
  • Genotype
  • Human Papillomavirus DNA Tests
  • Human papillomavirus 16 / genetics
  • Human papillomavirus 18 / genetics
  • Humans
  • Immunohistochemistry*
  • Ki-67 Antigen / analysis*
  • Middle Aged
  • Netherlands
  • Outpatients*
  • Papanicolaou Test
  • Papillomavirus Infections / diagnosis*
  • Papillomavirus Infections / metabolism
  • Papillomavirus Infections / pathology
  • Papillomavirus Infections / virology
  • Precancerous Conditions / diagnosis*
  • Precancerous Conditions / metabolism
  • Precancerous Conditions / pathology
  • Precancerous Conditions / virology
  • Predictive Value of Tests
  • Prospective Studies
  • Reproducibility of Results
  • Triage
  • Vaginal Smears
  • Young Adult

Substances

  • Cyclin-Dependent Kinase Inhibitor p16
  • Ki-67 Antigen
  • P16 protein, human