• Vivian Milani, Suzan Menasce Goldman, Flora Finguerman, Marianne Pinotti, Celso Scazufka Ribeiro, Nitamar Abdalla, and Jacob Szejnfeld.
• Institute of Diagnostic Imaging, Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, Brazil. vivian.milani@terra.com.br
• Sao Paulo Med J. 2007 Jul 5; 125 (4): 210214210-4.

Context And ObjectiveBreast cancer screening programs are critical for early detection of breast cancer. Early detection is essential for diagnosing, treating and possibly curing breast cancer. Since there are no data on the incidence of breast cancer, nationally or regionally in Brazil, our aim was to assess women by means of mammography, to determine the prevalence of this disease.Design And SettingThe study protocol was designed in collaboration between the Department of Diagnostic Imaging (DDI), Institute of Diagnostic Imaging (IDI) and São Paulo Municipal Health Program.MethodsA total of 139,945 Brazilian women were assessed by means of mammography between April 2002 and September 2004. Using the American College of Radiology (ACR) criteria (Breast Imaging Reporting and Data System, BIRADS), the prevalence of suspected and highly suspected breast lesions were determined.ResultsThe prevalence of suspected (BIRADS 4) and highly suspected (BIRADS 5) lesions increased with age, especially after the fourth decade. Accordingly, BIRADS 4 and BIRADS 5 lesions were more prevalent in the fourth, fifth, sixth and seventh decades.ConclusionThe presumed prevalence of suspected and highly suspected breast cancer lesions in the population of São Paulo was 0.6% and it is similar to the prevalence of breast cancer observed in other populations.

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