Worldwide, breast cancer is the most common malignant neoplasm among women, accounting for almost one in four cases of cancer and the greatest number of cancer-related deaths in less developed countries (Bray et al., 2018). The incidence of breast cancer is rising in low-and middle-income countries, as is the mortality rate, such that 62% of breast cancer deaths worldwide now occur in developing countries (Torre et al., 2017). The burden of breast cancer in Brazil, the largest country in South America, is similarly high. Breast cancer is the most prevalent cancer in Brazilian women, with prevalence rates ranging from 38.74/100,000 in the Northeast region-74.30/100,000 in the Southeast region of the country (Brazil, 2016). Moreover, breast cancer mortality is much higher in Brazil than in most high-income countries, with mortality rising