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  • Title: Anal squamous intraepithelial lesions are frequent among young HIV-infected men who have sex with men followed up at the Spanish AIDS Research Network Cohort (CoRIS-HPV).
    Author: González C, Torres M, Benito A, Del Romero J, Rodríguez C, Fontillón M, Trastoy M, Viciana P, Del Amo J, Ortiz M, Hernández-Novoa B, CoRIS-HPV Study Group.
    Journal: Int J Cancer; 2013 Sep 01; 133(5):1164-72. PubMed ID: 23404769.
    Abstract:
    The aim of our study was to determine the baseline prevalence of anal squamous intraepithelial lesions (SIL) and associated risk factors in HIV-infected men who have sex with men (MSM) in a Spanish ongoing multicenter cohort. CoRIS-HPV started in 2007, nested in the Spanish AIDS Research Network Cohort (CoRIS). Anal liquid cytology testing was performed. High-risk human papillomavirus (HR-HPV) infection was determined, and positive samples were genotyped. We analyzed all subjects up to April 2011. Multivariate logistic regression analyses were performed. A total of 551 subjects with baseline anal liquid cytologies were analyzed; 37.0% negative for intraepithelial lesion, 9.0% atypical squamous cells of uncertain significance (ASCUS), 41.0% low-grade SIL, 4.0% high-grade SIL and 9.0% inadequate. Prevalence of anal SIL (excluding ASCUS) in valid samples (n = 450) was 54.7% (95% confidence interval [CI] = 49.9-59.3). Globally HR-HPV prevalence was 81.7% (95% CI = 78.0-85.2). Multiple infections (≥2 HR-HPV genotypes) were documented in 77.7% (95% CI = 73.1-82.0). The only risk factor associated with anal SIL was the number of HR-HPV types; MSM with five or more HR-HPV genotypes had an odds ratio (OR) of anal SIL seven times greater (OR = 7.4; 95% CI = 2.8-19.6) than those with one HR-HPV genotype. No associations were found for age, educational level, smoking, geographical origin, CD4 T-cell count, antiretroviral treatment or number of sexual partners. The prevalence of anal SIL in young HIV-positive MSM is high, and the main risk factor is multiple infections with HR-HPV types.
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