Predictors of Resolution and Recurrence of Anal High-Grade Squamous Intraepithelial Lesions in People With HIV

High-resolution anoscopy (HRA) with ablation of high-grade squamous intraepithelial lesions (HSIL) can prevent the development of anal cancer in people with HIV (PWH). The authors sought to characterize factors associated with successful HSIL resolution or local or metachronous recurrence.

The authors conducted a retrospective study of 62 PWH who underwent HRAs from December 1, 2017, to July 1, 2022. Participants were ≥30 years old with ≥2 HRAs and ≥1 HSIL lesions. Poisson and logistic regressions were used to assess factors associated with HSIL resolution and local or metachronous recurrence of HSIL.

Of 62 PWH, 85.5% had resolution of at least 1 HSIL. Undergoing ≥5 HRAs with thermoablation was associated with HSIL resolution (adjusted rate ratio [aRR] = 2.82) (confidence interval [CI] = 1.55-5.15), p < .001). Tobacco use was negatively associated with resolution (aRR = 0.62 (CI = 0.43-0.90), p = .01). Of this cohort, 58.1% had HSIL recurrence. Having more HRAs (adjusted odds ratio [aOR] = 2.77 (CI = 1.27-6.06), p = .01) and female sex (aOR = 9.66 (CI = 1.14-81.85), p = .04) were associated with recurrence. Non-White race was negatively associated with recurrence (aOR = 0.12 (CI = 0.02-0.68), p = .04). This study was primarily limited by its retrospective nature and small sample size.

This study supports the utility of HRA/ablation for HSIL treatment with >85% of participants experiencing resolution of at least 1 HSIL. The authors found that having more HRAs was associated with a higher likelihood of resolution. However, the high rate of recurrence and progression to HSIL highlights the need for continued surveillance after treatment.