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Cancer Epidemiol Biomarkers Prev. 2017 Nov;26(11):1629-1635. doi: 10.1158/1055-9965.EPI-17-0534. Epub 2017 Sep 8.

Defining Optimal Triage Strategies for hrHPV Screen-Positive Women-An Evaluation of HPV 16/18 Genotyping, Cytology, and p16/Ki-67 Cytoimmunochemistry.

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Department of Research and Development, Dumfries and Galloway Royal Infirmary, Dumfries, United Kingdom.
Department of Research and Development, Dumfries and Galloway Royal Infirmary, Dumfries, United Kingdom.
Department of Obstetrics and Gynaecology, Dumfries and Galloway Royal Infirmary, Dumfries, United Kingdom.
Scottish HPV Reference Laboratory, Royal Infirmary of Edinburgh, Edinburgh, United Kingdom.
Department of Pathology, Monklands Hospital, Airdrie, United Kingdom.
Department of Pathology, NHS Highland, Inverness, United Kingdom.
Unit of Cancer Epidemiology/Belgian Cancer Centre, Scientific Institute of Public Health, Brussels, Belgium.


Background: Several options for the triage of high-risk HPV screen-positive (hrHPV+) women were assessed.Methods: This study incorporated CIN2+ cases and controls, all of whom tested hrHPV+ and whose results of liquid-based cytology (LBC), HPV16/18 genotyping, and p16/Ki67 cytoimmunochemistry were available. Sensitivity and specificity for the CIN2+ of these triage tests were evaluated.Results: Absolute sensitivities of HPV 16/18 typing, LBC, and p16/Ki-67 cytoimmunochemistry for CIN2+ detection were 61.7%, 68.3%, and 85.0% for women with hrHPV+ clinician-taken samples. Respective specificities were 70.5%, 89.1%, and 76.7%. The absolute accuracy of the triage tests was similar for women with a hrHPV+ self-sample. P16/Ki-67 cyto-immunochemistry was significantly more sensitive than LBC although significantly less specific.Conclusions: All three single-test triage options, if positive, exceed the threshold of 20% risk at which colposcopy would be indicated. However, none of them conferred a post-test probability of CIN2+ <2%; which would permit routine recall. P16/Ki-67 cytoimmunochemistry on HPV16/18 negative women had a post-test probability of CIN2+ of 1.7% and 0.6% if also LBC negative.Impact: This is one of the few studies to directly compare the performance of triage strategies of hrHPV+ women, in isolation and combinations. It is the only study assessing triage strategies in women who test hrHPV+ in self-taken vaginal samples. A combined triage option that incorporated HPV 16/18 typing prior to p16/ki-67 cytoimmunochemistry in HPV 16/18-negative women yielded a post-test probability of CIN2+ of >20%, whereas women who tested negative had a probability of CIN2+ of <2%. Cancer Epidemiol Biomarkers Prev; 26(11); 1629-35. ©2017 AACR.

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