Progression to and spontaneous regression of high-grade anal squamous intraepithelial lesions in HIV-infected and uninfected men

To quantify incidence of, and risk factors for, progression to and spontaneous regression of high-grade anal squamous intraepithelial lesions (ASILs).Retrospective review of patients at St Vincent's Hospital Anal Cancer Screening Clinic during a period when high-grade ASILs were not routinely treated (2004-2011).All patients who had an anal Papanicolaou smear or high-resolution anoscopy were included, except for patients with previous anal...