The AMAZONA III project is a collection of information about new cases of breast cancer in Brazilian women from 24 public and private health institutions, diagnosed as of January 2016, in the States of Amazonas, Bahia, Ceará, Goiás, Paraná, Rio de Janeiro, Rio Grande do Norte, Rio Grande do Sul, Santa Catarina and São Paulo. Three thousand patients will be included, who will be followed up for 5 years after diagnosis.

The main objective of this study is to increase the knowledge of the medical community about this disease in the Brazilian population, considering socio-demographic characteristics, time of diagnosis, types of treatment and survival, with a view to identifying problems and solutions for the early diagnosis and treatment of breast cancer. This study is extremely important for Brazil because this type of neoplasm is the leading cause of cancer death in women in the world. Of the cases in the country, it is most common in the South (74.30/100 thousand) and Southeast (68.08/100 thousand), while its mortality is higher in the North and Northeast regions.