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A prospective study in gynaecology clinics was conducted in Abidjan, Cote d'Ivoire, to assess the short-term evolution of squamous intraepithelial lesions (SILs). Of 94 women with a cytological diagnosis of SIL, 38 were infected with HIV. The average follow-up period after the initial smear was 5 months. Detection of human papillomavirus (HPV) by polymerase chain reaction (PCR) was performed at both the time of enrolment and final follow-up smear. There were 39 cases of persistent SILs. HIV-positive women had a higher percentage of persistent SIL (76%) than HIV-negative women (18%, relative risk (RR)=4.3, 95% confidence interval (CI)=2.4, 7.7). SILs were more frequent among women infected with HPV at the time of enrolment or with persistent HPV infection, but these associations disappeared after adjusting for HIV serostatus. Spontaneous regression of SILs commonly occurs in HIV-negative African women. HIV-infected women with cervical dyskaryosis require gynaecology follow-up. [ABSTRACT FROM AUTHOR]