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      Lesões intra-epiteliais cervicais em adolescentes: estudo dos achados citológicos entre 1999 e 2005, no Município do Rio de Janeiro, Brasil Translated title: Cervical intraepithelial lesions in adolescents: cytological findings from 1999 to 2005 in Rio de Janeiro, Brazil

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          Abstract

          A freqüência das lesões precursoras do câncer cervical vem crescendo entre a população de adolescentes, possivelmente, em conseqüência da diminuição da idade de início da vida sexual e do aumento no número de parceiros sexuais. Com o objetivo de analisar o comportamento das lesões precursoras do câncer cérvico-uterino entre adolescentes do Município do Rio de Janeiro, Brasil, estudou-se, de forma retrospectiva, 1.516.407 exames citológicos provenientes de unidades do Sistema Único de Saúde entre 1999 e 2005. Foram comparadas, ao longo do período, a distribuição das alterações citológicas e a tendência temporal dessa distribuição entre adolescentes e mulheres adultas. No período, observou-se maior freqüência de anormalidades citológicas no grupo de adolescentes, predominando as lesões de baixo grau. A prevalência de alterações cervicais em adolescentes duplicou, passando de 6,4% para 12,4%, enquanto, nas mulheres adultas, aumentou de 4% para 6,1%, sendo estimado incremento anual médio entre as adolescentes e mulheres adultas de, respectivamente 0,008% e 0,003%. Com base neste estudo e na literatura consultada, sugerimos a inclusão das adolescentes no grupo prioritário para rastreio citológico periódico do "Programa Viva Mulher".

          Translated abstract

          The prevalence of cervical intraepithelial neoplasias has increased in adolescents, probably due to the decrease in age at first intercourse and increase in the number of sexual partners. Our objective was to analyze the trends in cervical intraepithelial lesions in adolescents in the city of Rio de Janeiro, Brazil. We thus conducted a retrospective analysis of 1,516,407 Pap smears performed at public health units from 1999 to 2005. During the study period, the distribution and temporal trend in cytological abnormalities was compared between adolescent and adult women. There were more atypical smears in adolescents, mainly low-grade lesions. In adolescents, cervical abnormalities doubled during this period, from 6.4% to 12.4%, while in adult women it increased from 4.5% to 6.7%. Statistical analysis showed a tendency towards a linear increase in frequency of abnormal Pap smears in both adolescents and adults (0.008% and 0.003%, respectively). Based on this and other studies, we recommend including adolescents in the target population of the Brazilian cervical cancer screening program ("Programa Viva Mulher").

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          Genital human papillomavirus infection: incidence and risk factors in a cohort of female university students.

          Incidence data on human papillomavirus (HPV) infection are limited, and risk factors for transmission are largely unknown. The authors followed 603 female university students in Washington State at 4-month intervals between 1990 and 2000. At each visit, a sexual and health questionnaire was completed and cervical and vulvovaginal samples were collected to detect HPV DNA. At 24 months, the cumulative incidence of first-time infection was 32.3% (95% confidence interval: 28.0, 37.1). Incidences calculated from time of new-partner acquisition were comparable for enrolled virgins and nonvirgins. Smoking, oral contraceptive use, and report of a new male sex partner--in particular, one known for less than 8 months before sex occurred or one reporting other partners--were predictive of incident infection. Always using male condoms with a new partner was not protective. Infection in virgins was rare, but any type of nonpenetrative sexual contact was associated with an increased risk. Detection of oral HPV was rare and was not associated with oral-penile contact. The data show that the incidence of HPV associated with acquisition of a new sex partner is high and that nonpenetrative sexual contact is a plausible route of transmission in virgins.
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            Chapter 5: Updating the natural history of HPV and anogenital cancer.

            The major steps in cervical carcinogenesis include infection of the metaplastic epithelium of the cervical transformation zone with one or more of the 12-18 carcinogenic types of human papillomavirus (HPV) infection, viral persistence, clonal progression of the persistently-infected epithelium to cervical precancer, and invasion. Although these fundamental steps are established, several new epidemiologic studies have shed light on the factors that influence each of these transitions. The importance of the transformation zone in cervical cancer has been extended to other HPV-induced cancers such as anal or tonsillar cancers. Natural history studies show that HPV with normal cervical cytology and cervical intraepithelial neoplasia (CIN) grade 1 behave similarly, with the majority of both showing regression. Although these studies have demonstrated the importance of HPV persistence in the development of precancer CIN-3, the timing from infection to evidence of CIN-3 varies from 1 to 10 years. Whether equivalent lesions diagnosed later differ in their natural history remains unknown. Several factors have been implicated in enhancing persistence and/or progression. However, none are consistently associated with both except age: young women are less likely to show persistence and older women with persistence are more likely to be at risk of invasive cancer. Recent studies have also underscored the importance of the host immune response in clearance of established infections. Finally, data on non-cervical HPV infections, such as penile infections are limited to date compared to cervical infections. Several ongoing cohort studies should give us further insight into male infections in the near future.
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              Human papillomavirus infection and time to progression and regression of cervical intraepithelial neoplasia.

              Little is known about the duration of precancerous cervical lesions in relation to human papillomavirus (HPV) infection. We estimated rates of progression and regression and sojourn times of cervical squamous intraepithelial lesions (SILs) according to HPV status. We used data from a longitudinal study of HPV infection and cervical neoplasia in São Paulo, Brazil. Cervical specimens were taken from 2404 women for Pap cytology and polymerase chain reaction-based HPV testing every 4-6 months over a period of 8 years. We used actuarial and non-actuarial analyses to measure time to and rates of lesion progression and regression according to status and type of HPV infection. During follow-up, 118 low-grade SIL (LSIL), 24 high-grade SIL (HSIL), and 173 atypical squamous cells of undetermined significance (ASCUS) events were detected. Mean time to progression from ASCUS to LSIL or worse and from LSIL to HSIL or worse was shorter in women with oncogenic HPV types than in women with no HPV infection (mean times for ASCUS progression were 67.0 and 88.0 months, respectively, in women with oncogenic HPV and no HPV, difference = 21.0 months, 95% confidence interval [CI] = 11.3 to 30.7 months; mean times for LSIL progression were 73.3 and 83.5 months, respectively, difference = 10.2 months, 95% CI = -0.15 to 20.6 months). Half of the LSILs regressed to normal or ASCUS within 6 months. Mean times for regression from ASCUS to normal, from LSIL to ASCUS or normal, and from HSIL/cervical intraepithelial neoplasia 2 to ASCUS or normal were longer for women with oncogenic HPV types (16.8 months, 95% CI = 7.5 to 26.2 months; 13.8 months, 95% CI = 8.8 to 18.7 months; and 17.1 months, 95% CI = 4.1 to 30.1 months, respectively) than for women with non-oncogenic HPV types (7.7 months, 95% CI = 5.2 to 10.2 months; 7.8 months, 95% CI = 5.3 to 10.2 months; 8.9 months, 95% CI = 3.3 to 14.6 months) or for women with no HPV infection (7.6 months, 95% CI = 6.9 to 8.4 months; 7.6 months, 95% CI = 6.4 to 8.7 months; and 7.0 months, 95% CI = 5.0 to 8.9 months, respectively). Precursor lesions of the cervix persist longer and progress more quickly in women with oncogenic HPV infections than in women with non-oncogenic infections or without HPV. Testing cervical lesions for oncogenic HPVs may help identify those that are likely to progress rapidly.
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                Author and article information

                Journal
                csp
                Cadernos de Saúde Pública
                Cad. Saúde Pública
                Escola Nacional de Saúde Pública Sergio Arouca, Fundação Oswaldo Cruz (Rio de Janeiro, RJ, Brazil )
                0102-311X
                1678-4464
                December 2008
                : 24
                : 12
                : 2881-2890
                Affiliations
                [02] Rio de Janeiro Rio de Janeiro orgnameUniversidade Federal do Rio de Janeiro Brazil
                [01] Rio de Janeiro orgnameFundação Oswaldo Cruz orgdiv1Escola Nacional de Saúde Pública Sergio Arouca Brasil
                Article
                S0102-311X2008001200017 S0102-311X(08)02401217
                10.1590/S0102-311X2008001200017
                d3b46d8a-f3c6-4356-ac87-4aa3b518275a

                This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

                History
                : 09 August 2007
                : 08 April 2008
                : 16 April 2008
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 47, Pages: 10
                Product

                SciELO Public Health

                Self URI: Texto completo somente em PDF (PT)
                Categories
                Artigo

                Adolescent,Saúde da Mulher,Women's Health,Uterine Cervical Neoplasms,Neoplasias do Colo do Útero,Adolescente

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