Triaging HPV-positive women with p16/Ki-67 dual-stained cytology: Results from a sub-study nested into the ATHENA trial

Gynecol Oncol. 2017 Jan;144(1):51-56. doi: 10.1016/j.ygyno.2016.10.031. Epub 2016 Oct 27.

Abstract

Objectives: In addition to genotyping for HPV16/18, dual-immunostaining for p16/Ki-67 has shown promise as a triage of HPV-positive women. We assessed the performance of p16/Ki-67 dual-stained cytology for triaging HPV-positive women undergoing primary HPV screening.

Methods: All women ≥25years with valid cervical biopsy and cobas® HPV Test results from the cross-sectional phase of ATHENA who were referred to colposcopy (n=7727) were eligible for enrolment. p16/Ki-67 dual-stained cytology was retrospectively performed on residual cytologic material collected into a second liquid-based cytology vial during the ATHENA enrolment visit. The diagnostic performance of dual-stained cytology, with or without HPV16/18 genotyping, for the detection of biopsy-confirmed cervical intraepithelial neoplasia grade 3 or worse (CIN3+) was determined and compared to Pap cytology. Furthermore, the number of colposcopies required per CIN3+ detected was determined.

Results: Dual-stained cytology was significantly more sensitive than Pap cytology (74.9% vs. 51.9%; p<0.0001) for triaging HPV-positive women, whereas specificity was comparable (74.1% vs. 75.0%; p=0.3198). Referral of all HPV16/18 positive women combined with dual-stained cytology triage of women positive for 12 "other" HPV genotypes provided the highest sensitivity for CIN3+ (86.8%; 95% CI: 81.9-90.8). A similar strategy but using Pap cytology for the triage of women positive for 12 "other" HPV genotypes was less sensitive (78.2%; 95% CI: 72.5-83.2; p=0.0003), but required a similar number of colposcopies per CIN3+ detected.

Conclusions: p16/Ki-67 dual-stained cytology, either alone or combined with HPV16/18 genotyping, represents a promising approach as a sensitive and efficient triage for colposcopy of HPV-positive women when primary HPV screening is utilized.

Keywords: ATHENA; CINtec PLUS; Cervical cancer screening; Genotyping; HPV; Triage; p16/Ki-67 dual-stained cytology.

MeSH terms

  • Adult
  • Biopsy
  • Cervical Intraepithelial Neoplasia / chemistry*
  • Cervical Intraepithelial Neoplasia / diagnosis
  • Cervical Intraepithelial Neoplasia / pathology*
  • Cervical Intraepithelial Neoplasia / virology
  • Cervix Uteri / pathology
  • Clinical Trials as Topic
  • Colposcopy
  • Cyclin-Dependent Kinase Inhibitor p16 / analysis*
  • Female
  • Genotype
  • Humans
  • Ki-67 Antigen / analysis*
  • Papanicolaou Test
  • Papillomaviridae / genetics
  • Papillomavirus Infections / diagnosis
  • Papillomavirus Infections / virology*
  • Predictive Value of Tests
  • Referral and Consultation
  • Retrospective Studies
  • Triage / methods*
  • Uterine Cervical Neoplasms / chemistry*
  • Uterine Cervical Neoplasms / diagnosis
  • Uterine Cervical Neoplasms / pathology*
  • Uterine Cervical Neoplasms / virology
  • Vaginal Smears

Substances

  • CDKN2A protein, human
  • Cyclin-Dependent Kinase Inhibitor p16
  • Ki-67 Antigen