Desempenho da inspeção visual com acido acetico e da citologia oncologica no rastreamento do cancer do colo uterino

AUTOR(ES)

Marcus Vinicus von Zuben

DATA DE PUBLICAÇÃO

2005

RESUMO

Introduction. In regions with in low-resource settings for health care, it is very low the possibility of implementing in short term a cervical cancer screening reaching high coverage, with quality and resoluteness. In these conditions, alternative technologies adjusted to available resources should be tested. Objetives. To evaluate the performance of visual inspection with acetic acid and Pap test in detecting precursor lesions of cervical cancer. Subject and Methods. This was a cross-sectional study and validation of diagnostic test that included 2782 women. Pap test and visual inspection with 5% acetic acid were performed for all patients, and those having at least one abnormal test were called for colposcopical examination, and biopsy of abnormal areas. Frequencies, prevalences, sensitivity and specificity were calculated with their 95% confidence interval, as the positive and negative predictive values. The association of categorical variables was tested by Chi-Square Test. The software Epi-info version 3.2.2 was used for statistical analysis. Results. Pap test was abnormal in 6.5% of the women, and the visual inspection was abnormal in 19.8% of the women. According to histological diagnosis, the prevalences of CIN 1, CIN 2, CIN 3, invasive squamous cell carcinoma, adenocarcinoma in situ, and invasive adenocarcinoma were, respectively, 0.5%, 0.6%, 2.2%, 0.5%, 0.1%, 0.1%. The sensitivity, specificity, positive predictive value, and negative predictive value of Pap test were, respectively, 83.7%, 97.0%, 55.8%, and 99.2%, and visual inspection were 58.3%, 81.8%, 11.5%, and 98.0%. Conclusion. The performance of Pap test was better than the visual inspection with acetic acid. The visual inspection showed low sensitivity and low specificity, and then showed low positive predictive value. Nevertheless, the visual inspection showed that it could detect precursors lesions of cervical cancer, clinically significant. This characteristic becomes the visual inspection an alternative to be considered in regions where there are no conditions for cervical cancer screening based on Pap test

ASSUNTO(S)

estudos transversais colo uterino - cancer - prevenção neoplasia do colo uterino

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