Breast cancer is the most common cancer in women
worldwide, with nearly 1.7 million new cases diagnosed
every year. This represents about 12% of all new cancer
cases and 25% of all cancers in women (World Cancer
Research Fund International, 2015). Also, it is estimated an
increase of between 22.000-25.000 new cases per year. Even
more, in spite of being considered a multi-causal disease,
we must consider that between the 70% and the 80% breast
cancer occurs in women without a likely risk factor
