Detection Rate of High-Grade Squamous Intraepithelial Lesions as a Quality Assurance Metric for High-Resolution Anoscopy in HIV-Positive Men

Diseases of the Colon and Rectum
Matthijs L Siegenbeek van HeukelomJan M Prins

Abstract

High-resolution anoscopy-guided biopsies are the gold standard for identifying anal intraepithelial neoplasia, but diagnosing high-grade squamous intraepithelial lesions depends on the skills of the anoscopist. This study aims to validate the high-grade squamous intraepithelial lesion detection rate as a quality assurance metric for high-resolution anoscopy in HIV-positive men. This is a retrospective study. This study was conducted at 3 HIV outpatient clinics in Amsterdam, The Netherlands. HIV-positive men who have sex with men were selected for this study. We analyzed the high-grade squamous intraepithelial lesion detection rate per high-resolution anoscopy, the mean number of biopsies taken, and the mean high-grade squamous intraepithelial lesion rate per biopsy in time-subsequent groups for 7 anoscopists performing high-resolution anoscopy. Seven anoscopists performed high-resolution anoscopy in 1340 HIV-positive men who have sex with men. The overall high-grade squamous intraepithelial lesion detection rate for all 7 anoscopists combined increased significantly over time, from 27% to 40% (p < 0.001; OR, 1.15; 95% CI, 1.08-1.23 per 50 high-resolution anoscopies). The mean number of biopsies increased significantly from 1.4 ...Continue Reading

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